You seemed to have gotten the equation wrong, but don't worry I'll help you =================================================================== First you simplify the equation 4=(-1)(-3)+b (A negative times a negative is a positive) 4 = 3 + b (Flip the equation) b + 3 = 4 -------------------------------------- Then you subtract 3 from each side b+3-3=4-3 b = 1 is your answer =================================================================== y = -1x - 7 is wrong as well To find the answer just add -4 on each side for y+4=-1(x-3) y+4+-4=-x+3+-4 y = -x - 1 is the answer To graph, plot points on Y-intercept of -1 and place another point at (-2,1)