Question

A. m=3h-24B. m=3h+24C. m=8hD. m=8h+8please help me

Answer 1

Formular for line graph is
$y=mx+b$

Find the gradient first
${ \frac{y1-y2}{x1-x2} } \\ \\ = { \frac{0-80}{0-10} } \\ \\ = { \frac{-80}{-10} } \\ \\ = 8$

Substitude the gradient to the formular

$80=8(10)+b \\ \\ b=0$

∴ m=8h is the equation of the graph.

Answer is C.