Unsure of what y ou want! y = 4x + 5 is already in slope-intercept form. If you want "standard form," which looks like Ax + By + C = 0, then identify A, B and C from the given equation y=4x+5. Rewrite this as -4x + 1y - 5 = 0, so that A=-4, B=1 and C= -5. This is the eqn in standard form.