Answer:
d = 14
Step-by-step explanation:

Answer:
4
Step-by-step explanation:
Answer:
The answer is D.
Step-by-step explanation:
As said in the problem, we are labeling the total minutes used <em>x </em>and the total monthly income as <em>y</em>. This means that in the graph we will be making the y-axis should represent the total monthly charges, and the x-axis should represent the total minutes.
Thus the graph should go through points (100,155) and (200,245) and its slope is:

Y=10 bc y-x=5 then 5+5= 10