The amount of money a store earns during each hour one day can be modeled by the function y = -8x^2 + 64x – 60, where y is in dollars and x is the time in hours from when the store opens. During which hour will the store earn $68?

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Step-by-step explanation:

After “4 hours” of work will the store earn $68.

Step-by-step explanation: To find the answer you plug in 4 to the equation it looks like this y = -8(4)^2 + 64(4) - 60. Once you multiply the number it turns into y = -128 + 256 - 60. Then. Once you do all the addition and subtraction you get y = $68.

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the first one, all those points on the line just make a strait line.