A rental car company charges $75 for a 3day rental & $155 for a 7day rental. Write an equation to find...HELP?

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A rental car company charges $75 for a 3day rental & $155 for a 7day rental. Write an equation to find...HELP?

A rental car company charges $75 for a 3-day rental and $155 for a 7-day rental. Write an equation to find the amount that the rental car company will charge for any number of days.
y = 20x + 15
y = 15x - 20
y = 25x

2007-04-19 14:47:12 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

3 answers

The answer would definitely be y=20x+15: since when x=3, y=75 and when x=7, y=155.

2007-04-19 14:50:30 · answer #1 · answered by bruinfan 7 · 0⤊ 0⤋

(3,75) and (7,155)

m = (155 - 75)/(7 - 3) = (80/4) = 20

(3,75), m = 20
75 = 20(3) + b
75 = 60 + b
b = 15

ANS : y = 20x + 15

2007-04-19 16:10:36 · answer #2 · answered by Sherman81 6 · 0⤊ 0⤋

answer A

2007-04-19 14:52:06 · answer #3 · answered by pulleyman123 2 · 0⤊ 0⤋