Question

What is the equation of the line through the origin and (7,-5)?

Answer 1

y1 - y2 / x1 - x2

-5 - 0 / 7 - 0

-5/7

y = mx + b

-5 = -5/7(7) + b

-5 = -5 + b

0 = b

y = -5/7x

Hope this helps! ;)