Question

Which of the following is an equation of the line through (2, 3) and (−1, −12)?

A. y = 1/5x + 13/5
B. y = −1/5x + 17/5
C. y = 5x − 7
D. y = −5x + 7

Answer 1

C) y = 5x - 7

Explanation:

slope between two given points is:

3-(-12) over 2-(-1) which is 15/3 or 5

a slope of 5 eliminates options A and B

select one of the given points and plug in values to find the y-intercept:

3 = 5(2) + b

3 = 10 + b

-7 = b