through the point K(3, 5), how do you draw the line with the slope of -2?
Plot the point K at X1 = 3 and Y1 = 5, AND a second point (X2, Y2) at any different value X2, and make the change in Y, (Y2-Y1), equal to -2 times the change in X.
Y2 - Y1 = (-2) (X2 - X1)
Then draw a straight line through both points.