Delivery company charges $10 plus 40¢ per kilometer or part of a kilometer. Find the cost for a trip of:
a.5 kilometers
b.7.5 kilometers
c.3.2 kilometers
d.Graph the ordered pairs (kilometers, cost). Is this a function?

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  1. 10 + .4*5 = 12

    10 + .4*8 = 13.2

    10 + .4*4 = 11.6

    it may be bumpy but:

    There is one and only one output value for every input value.
    Therefore it is a function.

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    posted by Damon

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