You can put this solution on YOUR website! What is the equation of a line with a slope of 4 and passing through the point (1,-1)?
Use the point/slope form: y - y1 = m(x - x1)
y - (-1) = 4(x - 1)
y + 1 = 4x - 4
y = 4x - 4 - 1
y = 4x - 5
confirm this, substitute 1 for x and see that it will = -1