Question

Need help with this problem

Answer 1

Hello
how is your day going?

the answer is going to be 

m=4

Answer 2

Find two points on the graph and plug them into the formula. 
(0,0) and (1,4) are the easiest.
(y2-y1)/(x2-x1)=m
(4-0)/(1-0)=m
4/1=1
m=4