Back to Construct a function to model a linear relationship between two quantities — Problem 1 · Task Set 49

8.F.B.4 Tutor Intake -- Constructing Linear Function Models

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Grade 8·7 problems·~8 min·Common Core Math - Grade 8·container·8-f-b-4

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Concepts

"A car wash charges a $6 setup fee plus $9 per car washed." In the
equation y = mx + b modeling the total cost y for x cars washed,
which value is m and which is b?

m = 9 (the amount that changes per car), b = 6 (the fixed fee).

m = 6 (the amount mentioned first), b = 9 (the amount mentioned second).

m = 6 and b = 9, because the setup fee is the rate and the per-car charge is fixed.

There is not enough information to tell which is m and which is b.