algebra 1 unit quiz

Question

The following graphs shows the number of umbrellas sold at a store relative to the amount of rainfall in the town where the store is located.

Based on the line of best fit, approximately how many umbrellas would be sold if there were 6 inches of rain in the town?

20

⊝

40

⊝

60

⊝

80

Answer 1

Carefully observing and following the trend of the graph, if there was 6 inches of rain, I would estimate about 40 umbrellas to be sold.

Answer 2

For 6" of rain, about 40 umbrellas would be sold by observing the trend using the line of best fit. That said, this prediction should be used with caution as there could be risks of extrapolation as most of the X values (amount of rainfall) are close to or below 4". So the line of best fit is good for making predictions for rainfall close to or less than 4", Unless there is a strong reason to believe that the linear trend will continue, predicting for 6" could be extrapolation.

Answer 3

When the rainfall is about 5 in.about 40 umbrellas would be sold