Answer:
(b)
Step-by-step explanation:
Given

Required
The graph
First, make y the subject

Divide through by 3

Let x = 3

Let x = 6

So, we plot the graph through
and 
See attachment for graph
Divide 7 into 5 to find each penny value.
7/5 = 1.4
Thus, 1 penny is equal to 1.4 mm
100/1.4 = 71.43
Therefore 71.43 pennies is equal to 100mm.
21.25/ 125 = 0.17
17 % tip
Answer:
25
Step-by-step explanation:
65+A=90
A=90-65=25