SOLUTION: A health club charges a set fee to join and a monthly fee to remain a member. If Susan joins for 5 months and pays $115, and John pays $75 for 3 months, how much will their friend

Question 512851: A health club charges a set fee to join and a monthly fee to remain a member. If Susan joins for 5 months and pays $115, and John pays $75 for 3 months, how much will their friend Aaron pay for 8 months? The five step method is started below.
Let m=the monthly charge, and let f=the enrollment fee.
Thank You
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
What they are really asking is for the graph of the function
. The monthly charge would be the slope of the line
if I plot f versus months (t)
Use the point-slope formula

So, the monthly charge is $20 and the set fee is $15
for 8 months:

Aaron pays $175
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