EXAMPLE 9 Using the regression equation to make a prediction

Suppose we are moving to a city that has a low temperature of 40°F on this particular day. Use the regression equation in Example 6 to find the predicted high temperature for this city.

Solution

To generate an estimate of the high temperature, we plug in the value of 40°F for the variable low:

We would say, “The estimated high temperature for an American city with a low temperature of 40°F is 64°F.”