Mathematics
Grade10
Easy
Question
Find the equation of a line whose slope is -7 and y-intercept is -8.
- y = -7x + 8
- y = -7x - 8
- y = 7x - 8
- y = 7x + 8
Hint:
Given the slope of line as m and intercept as b .
the Equation of line will be y = mx + b .
The correct answer is: y = -7x - 8
Given slop = -7 and intercept = -8
Step 1 : Using the slope and y-intercept of the line to write the equation of the line.
Slope-intercept from of equation of a line is y = mx +b
Step 2 : substituting values
⇒ y = -7x -8 [substituting -7 for m and -8 for b]
So , y = -7x -8 is the equation of line with slop = -7 and intercept = -8 .
Equation of line in slope intercept form is
y = slope.x + intercept .
