Question

In an area of the Midwest, records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushels per acre). The data for a 9 year period is given in the table. The equation of the line of best fit for this data is y = 47.3 + 0.78x. How many bushels of wheat per acre can be predicted if it is expected that there will be 17 inches of rain?

Answer 1

You already have the equation of the line of the best fit that describes the yield of wheat, in bushels per acre \((y)\), as a function of the rainfall, in inches \((x)\).
If the rainfall, in inches, is \(x = 17\), then all you need to do is replace \(x\) by \(17\) on the equation to get the expected yield.