Question

# Find the equation of line that passes through the point (2, -9) and which is perpendicular to the line x = 5.

## The correct answer is: y = - 9

### Hint:-

1. Slope of verticle lines are undefined & slop of horizontal lines are 0.

2. Slopes of Perpendicular lines are negative reciprocals of each other.

3. Equation of a line in slope point form is-

(y-y1) = m (x-x1)

Step-by-step solution:-

Let l be the line for which slope is to be found.

The given equation of line x = 5 represents a verticle line (because its y-coordinate = 0)

Now, line l is perpendicular to the given line (x = 5).

∴ line l is a horizontal line i.e. parallel to x-axis.

Slope of a horizontal line i.e. parallel to x-axis is always 0

∴ Slope of line l = m = 0 …...................................................................................................... (Equation i)

We are given that line l passes through the point (2,-9) and we know its slope.

i.e. x 1 = 2 & y1 = -9 & m = 0

We can use slope point form of an equation to find the equation of line l-

(y - y1) = m (x - x1)

∴ [y - (- 9)] = 0 (x - 2)

∴ y + 9 = 0

∴ y = - 9

Final Answer:-

∴ Equation of the given line is y = -9.

Use the perpendicular line formula to determine whether two given lines are perpendicular. For example, when the slope of two lines is given to compare, we can use the perpendicular line's formula. A 90-degree angle is created by two lines that are perpendicular to one another.

Slope exists on every line. Because it shows how quickly our line is rising or falling, the slope of a line reveals how steep a line is. Mathematically, the slope of a line is known as the ratio of change in the line's y-value to the change in its x-value.

¶A line's slope can be determined using its two points (x_{1}, y_{1}) and (x_{2}, y_{2}). The formula (y_{2} - y_{1}) / is used to find the change in y and divided by the change in x. (x_{2} - x_{1}).

### Related Questions to study

### Write the equations of the given lines.

Line 1: y-intercept = 3, slope = 2

Line 2: y-intercept = - 1, slope = -5

### Write the equations of the given lines.

Line 1: y-intercept = 3, slope = 2

Line 2: y-intercept = - 1, slope = -5

Carrie, a packaging engineer, is designing a container to hold 12 drinking glasses shaped as regular octagonal prisms. Her initial sketch of the top view of the base of the container is shown above.

If the length and width of the container base in the initial sketch were doubled, at most how many more glasses could the new container hold?

**Note:**

A few simple ideas are used in solving this problem, like, area of a rectangle is given by the product of its length and breadth and the basic idea of division.

Carrie, a packaging engineer, is designing a container to hold 12 drinking glasses shaped as regular octagonal prisms. Her initial sketch of the top view of the base of the container is shown above.

If the length and width of the container base in the initial sketch were doubled, at most how many more glasses could the new container hold?

**Note:**

A few simple ideas are used in solving this problem, like, area of a rectangle is given by the product of its length and breadth and the basic idea of division.

### Identify a line having zero slope

### Identify a line having zero slope

### Find the area of triangle with base 5 cm and whose height is equal to that of the rectangle with base 5 cm and area 20 cm^{2}

### Find the area of triangle with base 5 cm and whose height is equal to that of the rectangle with base 5 cm and area 20 cm^{2}

### A cuboid box has a square base of side 7 units and a height of 12 units. What is the cylinder with the maximum volume, which can be carved out of this cuboid?

### A cuboid box has a square base of side 7 units and a height of 12 units. What is the cylinder with the maximum volume, which can be carved out of this cuboid?

### Calculate the area and height of equilateral triangle whose perimeter is 48 cm

### Calculate the area and height of equilateral triangle whose perimeter is 48 cm

### Identify a line with an undefined slope.

### Identify a line with an undefined slope.

### Write an equation of the line with undefined slope and passing through (5,11).

### Write an equation of the line with undefined slope and passing through (5,11).

### Find the :

a. Area of triangle whose three sides are 8 cm, 15 cm, 17 cm long

b .Find the altitude from opposite vertex to the side whose length is 15cm

### Find the :

a. Area of triangle whose three sides are 8 cm, 15 cm, 17 cm long

b .Find the altitude from opposite vertex to the side whose length is 15cm

### An arc of a circle measures 2.4 radians. To the nearest degree, what is the measure, in degrees, of this arc? (Disregard the degree sign when gridding your answer.)

**Note:**

Another answer for this problem could be taken as 137 as well.

Unitary method is finding out the value of one unit from the relation given and then multiplies the value of the single unit with the number of required units.

### An arc of a circle measures 2.4 radians. To the nearest degree, what is the measure, in degrees, of this arc? (Disregard the degree sign when gridding your answer.)

**Note:**

Another answer for this problem could be taken as 137 as well.

Unitary method is finding out the value of one unit from the relation given and then multiplies the value of the single unit with the number of required units.