How can I perform linear regression, fixing the slope to equal 1.0 (or some other value)?

Prism's linear regression analysis does not let you fix the slope to equal 1.0. But Prism's nonlinear regression analysis lets you fix any parameter to any value. And you can fit a linear model using "nonlinear regression". Follow these steps:

1. From your data, click analyze and choose nonlinear regression.
2. Choose the "Polynomial, first order (straight line)" model, which makes "noninear" regression identical to linear.
3. Go to the constraints tab, and fix the slope to be a constant of 1.0 or whatever value you choose.