Question

Write the equation of the line that passes through the points (-7, 14) and (-21, 28) in slope-

intercept form.

Answer 1

y = -x + 7

Explanation:

1. find slope

y2-y1/x2-x1=m

28-14/-21-(-7)= -14/14=-1

2. point slope form to find line at a point

y-y1=m(x-x1)

y-14=-1(x-(-7))

3. isolate y

y=-x+7