IMathAS-libretexts

Hint 1

The graph shows the function $\displaystyle {y}={f{{\left({t}\right)}}}$ , where $\displaystyle {y}$ is the rate of fuel sales at a gas station (measured in gallons per minute), and $\displaystyle {t}$ is the number of minutes after noon.

To determine the total amount of fuel sold during the first 20 minutes after noon, we should...

Find the slope of the tangent line to the curve shown, at the input 20.
Find the height on the curve shown for the input 20.
Find the area under the curve shown and above the x-axis, between the input 0 and the input 20.
None of the above

To determine the rate at which the fuel is being sold, 20 minutes after noon, we should...

Find the height on the curve shown for the input 20.
Find the slope of the tangent line to the curve shown, at the input 20.
Find the area under the curve shown and above the x-axis, between the input 0 and the input 20.
None of the above

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