30 Days Of Python

Damn my math is really rusted I guess. When it says: Calculate the slope, x-intercept and y-intercept of y = 2x -2 Isn't the slope already on the formula? Isn't the slope the first 2? Y = mx + b? So m is slope (2) and b is -2? Because I'm trying to figure out how to calculate he slope with this formula, but slope is already in there no? Or am I stupid?