Question

A line includes the points (-3, 8)and (-1, 2). What is its equation in slope- intercept form

Answer 1

Solve for slope first:
m =
`(y2 - y1)/(x2 - x1)`

m =
`(2-8)/(-1-(-3))` = -3

then solve for b in y = mx + b

8 = -3(-3) + b
b = -1

y = -3x - 1