Which of the following best describes the technique used to graph the equation y = 9x + 4using the slope and y-intercept? Mark a point at 4 on the y-axis, go down 9 and right one and mark this point. Mark a point at 4 on the y-axis, go up 9 and right one and mark this point. Mark a point at 9 on the y-axis, go up 4 and left one and mark this point. Mark a point at 9 on the y-axis, go up 4 and right one and mark this point.