Maths-
SAT
Easy
Question
|
x |
f(x) |
|
0 |
-2 |
|
2 |
4 |
|
6 |
16 |
- 6
- 7
- 8
- 9
The correct answer is: 7
From y – y1 = m(x – x1)
m = slope = 
picking two points from the table (0,-2) (6,16)
slope = 
the equation becomes:
y-(-2) = 3(x-0)
y + 2 = 3x
y = f(x) = 3 x -2
f (3) = 3(3) -2
= 9 – 2 = 7
Related Questions to study
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A customer’s monthly water bill was $75.74. Due to a rate increase, her monthly bill is now $79.86. To the nearest tenth of a percent, by what percent did the amount of the customer’s water bill increase?
A customer’s monthly water bill was $75.74. Due to a rate increase, her monthly bill is now $79.86. To the nearest tenth of a percent, by what percent did the amount of the customer’s water bill increase?
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As part of an experiment, a ball was dropped and allowed to bounce repeatedly off the ground until it came to rest. The graph above represents the relationship between the time elapsed after the ball was dropped and the height of the ball above the ground. After it was dropped, how many times was the ball at a height of 2 feet?
As part of an experiment, a ball was dropped and allowed to bounce repeatedly off the ground until it came to rest. The graph above represents the relationship between the time elapsed after the ball was dropped and the height of the ball above the ground. After it was dropped, how many times was the ball at a height of 2 feet?
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Number of States with 10 or More Electoral Votes in 2008
|
Electoral votes |
Frequency |
|
10 |
4 |
|
11 |
4 |
|
12 |
1 |
|
13 |
1 |
|
15 |
3 |
|
17 |
1 |
|
20 |
1 |
|
21 |
2 |
|
27 |
1 |
|
31 |
1 |
|
34 |
1 |
|
55 |
1 |
Number of States with 10 or More Electoral Votes in 2008
|
Electoral votes |
Frequency |
|
10 |
4 |
|
11 |
4 |
|
12 |
1 |
|
13 |
1 |
|
15 |
3 |
|
17 |
1 |
|
20 |
1 |
|
21 |
2 |
|
27 |
1 |
|
31 |
1 |
|
34 |
1 |
|
55 |
1 |
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A study was done on the weights of different types of fish in a pond. A random sample of fish were caught and marked in order to ensure that none were weighed more than once. The sample contained 150 largemouth bass, of which 30% weighed more than 2 pounds. Which of the following conclusions is best supported by the sample data?
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(x − 6)(x + 0.7) = 0 ?
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When designing a stairway, an architect can use the riser-tread formula 2h + d = 25, where h is the riser height, in inches, and d is the tread depth, in inches. For any given stairway, the riser heights are the same and the tread depths are the same for all steps in that stairway.
The number of steps in a stairway is the number of its risers. For example, there are 5 steps in the stairway in the figure above. The total rise of a stairway is the sum of the riser heights as shown in the figure.
Some building codes require that, for indoor stairways, the tread depth must be at least 9 inches and the riser height must be at least 5 inches. According to the riser-tread formula, which of the following inequalities represents the set of all possible values for the riser height that meets this code requirement?
When designing a stairway, an architect can use the riser-tread formula 2h + d = 25, where h is the riser height, in inches, and d is the tread depth, in inches. For any given stairway, the riser heights are the same and the tread depths are the same for all steps in that stairway.
The number of steps in a stairway is the number of its risers. For example, there are 5 steps in the stairway in the figure above. The total rise of a stairway is the sum of the riser heights as shown in the figure.
Some building codes require that, for indoor stairways, the tread depth must be at least 9 inches and the riser height must be at least 5 inches. According to the riser-tread formula, which of the following inequalities represents the set of all possible values for the riser height that meets this code requirement?
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The number of steps in a stairway is the number of its risers. For example, there are 5 steps in the stairway in the figure above. The total rise of a stairway is the sum of the riser heights as shown in the figure.
Which of the following expresses the riser height in terms of the tread depth?
When designing a stairway, an architect can use the riser-tread formula 2h + d = 25, where h is the riser height, in inches, and d is the tread depth, in inches. For any given stairway, the riser heights are the same and the tread depths are the same for all steps in that stairway.
The number of steps in a stairway is the number of its risers. For example, there are 5 steps in the stairway in the figure above. The total rise of a stairway is the sum of the riser heights as shown in the figure.
Which of the following expresses the riser height in terms of the tread depth?
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?
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| Sunflower Growth |
|
| Day |
Height (cm) |
| 0 |
0.00 |
| 7 |
17.93 |
| 14 |
36.36 |
| 21 |
67.76 |
| 28 |
98.10 |
| 35 |
131.00 |
| 42 |
169.50 |
| 49 |
205.50 |
| 56 |
228.30 |
| 63 |
247.10 |
| 70 |
250.50 |
| 77 |
253.80 |
| 84 |
254.50 |
In 1919, H. S. Reed and R. H. Holland published a paper on the growth of sunflowers. Included in the paper were the table and graph above, which show the height h, in centimeters, of a sunflower t days after the sunflower begins to grow.
Over which of the following time periods is the average growth rate of the sunflower least?
| Sunflower Growth |
|
| Day |
Height (cm) |
| 0 |
0.00 |
| 7 |
17.93 |
| 14 |
36.36 |
| 21 |
67.76 |
| 28 |
98.10 |
| 35 |
131.00 |
| 42 |
169.50 |
| 49 |
205.50 |
| 56 |
228.30 |
| 63 |
247.10 |
| 70 |
250.50 |
| 77 |
253.80 |
| 84 |
254.50 |
In 1919, H. S. Reed and R. H. Holland published a paper on the growth of sunflowers. Included in the paper were the table and graph above, which show the height h, in centimeters, of a sunflower t days after the sunflower begins to grow.
Over which of the following time periods is the average growth rate of the sunflower least?
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For the solution (x, y) to the system of equations above, what is the value of x − y ?
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For the solution (x, y) to the system of equations above, what is the value of x − y ?
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Michael performed an experiment where he tossed two coins, one dime and one nickel, at the same time and recorded whether each one landed on heads or tails. His results are shown in the table below.
|
|
Nickel |
||
| Heads |
Tails |
||
| Dime |
Heads |
27 |
26 |
|
Tails |
24 |
23 |
|
Michael performed an experiment where he tossed two coins, one dime and one nickel, at the same time and recorded whether each one landed on heads or tails. His results are shown in the table below.
|
|
Nickel |
||
| Heads |
Tails |
||
| Dime |
Heads |
27 |
26 |
|
Tails |
24 |
23 |
|
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maths-sat
