This task is about graphing and solving linear equations.
Adam needs to find someone to mend his mountain bike.
The local bike shop says that this will cost $15 plus $2 per minute of time they spend fixing it.

This can be written as the equation:
c = 2t + 15
where c is the cost in dollars
t is the time spent in minutes

a) 
Fill in the costs in this table for each of the times given.


b)

This rule can be drawn as a graph. Plot the points from the table in a) on this graph.

Cost of Fixing a Mountain Bike per Minute Spent in Repair


c)

If the repairs took 35 minutes, what was the cost? $__________

d)

If the job cost $45, how long did the repairs take? __________ minutes
