13. The function y = 40(x - 1) + 70 can be used to determine the cost in dollars

Mathematics

1 answer:

mote1985 [20]2 years ago

4 0

Step-by-step explanation:

the function actually is

y = 40(x - 1) + 70 = 40x - 40 + 70 = 40x + 30

still, the slope (the factor of x) is 40.

that means y (the cost) increases by 40 for every additional hour (x increases by 1).

so, the rate of change (slope) is 40/1 = $40 per hour.

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