Q: Line through (1,2) and (5,10). Write two-point form, then find intercepts and intercept form. (y−2)/(10−2) = (x−1)/(5−1): (y−2)/8 = (x−1)/4 → y = 2x. Intercepts: both 0 - passes through origin! (No intercept form; it's y = 2x.)