Posted by **logan** on Tuesday, February 19, 2008 at 9:01pm.

your local rollerblade rink will rent you blades for $14.00 for 3 hours or $29.00 for 8 hours. Asume the price increase is constant depending on the number of hours the blades are rented.

Find the expression

- algebra -
**Damon**, Tuesday, February 19, 2008 at 9:41pm
x = hours

y = price

two points (3,14) and (8,29)

y = m x + b

m = (29-14)/(8-3) = 15/5 = 5

y = 5 x + b

14 = 5(3) + b

b = -1

so

y = 5 x - 1

- algebra -
**Damon**, Tuesday, February 19, 2008 at 9:58pm
whoops, sorry

m = (29-14)/(8-3) = 15/5 = 3

y = 3 x + b

14 = 3(3) + b

b = 5

so

y = 3 x +5

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