Question

What is the equation of the line that passes through the points (20,-3) and (0,2)?

A. Y=4x+2
B. Y=-4x+2
C. Y=-1/4x+2
D. Y= 1/4x+2

Answer 1

C

Explanation:

Put the equation in the form y = mx + b where m is the slope and b is the y-intercept

First, find the slope by doing the change in y divided by the change in x for the two points. This would be
`(2-(-3))/(0 - 20) = -(5)/(20) = -(1)/(4)`. m = -1/4 in the equation.

So far, the equation is y = -1/4x + b

This means the slope is -1/4. Since it give you the y intecept, (0, 2), you know that b is 2 and the equation would be C. y = -1/4x + 2