8. Determine the amplitude of the following graph. 6. Graph the following features: . Slope = is plastic Y-intercept = -3 7. Graph the equation y = -x - 4x + 5 on the accompanying set of axes. You must plot 5 points including the roots and the vertex. 9. Find the median and mean of the data set below; 28, 22, 23, 41, 41 10 - - 7 6 -5 4 3 -2 -1 6 7 8 9 10 10. For the following set of data, find the population standard deviation, to the nearest hundredth. 78, 48, 71, 70, 51, 60, 82, 55