Since they already provided you with the slope all you have to do is plug in the x and y value and slope they gave you in the standard slope intercept formula and solve for b ( the y-int ) . So your equation would look like " 9 = 3(-8) + b " . Once you solve this you'll get b = 33 . So now you know your slope and y intercept ! All you gotta do is plug it into the formula, thus you get " y = 3x + 33 "
