Question

A line passes through the point (1, -5) and has a slope of -9.

Write an equation in slope-intercept form for this line.

Answer 1

Explanation:

The slope-intercept form of a straight line is y = mx + b, where m is the slope and b is the y-intercept (the value of y when x = 0).

m is -9:

y = -9x + b

To find b, enter the one given point (1,-5)and solve for b:

y = -9x + b

-5 = -9*(1) + b

b = 4

The equation becomes y = -9x + 4