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Practice problem

Residual Values - Definition & Examples

By Elise Molinaro
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Temperature (F)Ice Cream Sales60∘$12065∘$15070∘$18075∘$21080∘$24085∘$27090∘$300\begin{array}{|c|c|} \hline \text{Temperature (F)}&\text{Ice Cream Sales}\\ \hline 60^{\circ}&\$120\\ 65^{\circ}&\$150\\ 70^{\circ}&\$180\\ 75^{\circ}&\$210\\ 80^{\circ}&\$240\\ 85^{\circ}&\$270\\ 90^{\circ}&\$300\\ \hline \end{array}

The table above represents points on a trend line for the relationship between temperature and ice cream sales. If, when the temperature was 80 degrees, the actual sales were 180 dollars, what would be the residual?

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