Question

I'm confused with this question

Answer 1

Dependent variable is dependent on the independent variable
independent variable influences the dependentvariable
number of months influences the hcost


independent=number of months
dependent=cost

for the cost for 4 or 2 months, just start at months=2 or 4 and go up till you hit the line

equation=y=mx+b
m=slope
b=yintercept or starting point


solid line
initial fee=20
see attachment, black lines are what they are
2 months=$80
4months=140
rate is $30 per month
equation is c=30m+20

dashed line
intial fee=50
attachment, blue is dashed points
2months=$70
4months=$90
rate is $10 per month
equation is y=10x+50