Question

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

Answer 1

Formular for line graph is

`y=mx+b`

Find the gradient first

`{ (y1-y2)/(x1-x2) } \\ \\ = { (0-80)/(0-10) } \\ \\ = { (-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.