It would be very nice if we could somehow find the slope of the line. Unfortunately, the only way to find the slope of the line in this situation is to use calculus and find the slope of the line tangent to the curve at each point. But that's very tedious and takes a lot of work. So it would be very nice if we could somehow represent vapor pressure and temperature in an easier relation, in an easier function. And mathematically, one of the most simplest functions is a linear function. And a linear function is represented by this equation y equals MX plus B, where y is our range value, x is our domain value, m is a constant slope, and B is the y intercept.