Question: Pasquale's cell phone plan charges him monthly using the relation y = 0.25x + 20, where y is the total monthly bill and x is

Pasquale's cell phone plan charges him monthly using the relation y = 0.25x + 20, where y is the total monthly bill and x is the number of minutes he used for the month.

a) What is the initial value? Explain what type of variation does this question represent?

b) How do you know the relation is linear?

c) Determine the rate of change in his monthly bill.What does the rate of change mean?

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