To run a linear regression analysis, from the menus choose:

Analyze
Regression
Linear...

Select Log-transformed sales as the dependent variable.

The distribution of Log-transformed sales is closer to normal than Sales in thousands, and the linear regression model works better with normal variables.

Select Vehicle type through Fuel efficiency as independent variables.

Click Statistics.

Select Part and partial correlations and Collinearity diagnostics.

Click Continue.

Click OK in the Linear Regression dialog box.