Slope intercept is y=Mx+b where m is always the slope and b is always your y intercept. The point slope fo is y-y^1=m(x-x^1) where x1 and y1 are a known point and m is the still the slope. X and y is another point on the linear equation
The coefficients are 7.5 and 0.2. The variables are OH and OS, and the constant is 40. Good luck.
