Which statements accurately describe how to determine the y-intercept and the slope from the graph below? to find the y-intercept, begin at the origin and move horizontally to the graphed line. to find the slope, use two ordered pairs on the line and substitute into the equation . to find the y-intercept, begin at the origin and move horizontally to the graphed line. to find the slope, use two ordered pairs on the line and substitute into the equation . to find the y-intercept, begin at the origin and move vertically to the graphed line. to find the slope, use two ordered pairs on the line and substitute into the equation . to find the y-intercept, begin at the origin and move vertically to the graphed line. to find the slope, use two ordered pairs on the line and substitute into the equation .