Quadratic Graphs 1) a. Complete the table for y = x2 - 3x and plot the graph on the opposite grid. . x y 4 3 2 -1 0 1 2 3 4 1 x2 -2 -3x -1 0 1 2 3 4 5 x -1 y -2 b. What are the coordinates of the lowest point on the graph. -3 2) a. Complete this table for y = x2 – 4x – 3 and plot the graph on the opposite grid. x y 4 3 -1 0 1 2 3 4 5 2 1 x2 -2 -1 0 -1 -4x -2 -3 -3 -4 y -5 b. What are the coordinates of the lowest point on the graph. -6 -7 -8 -9 J. Mills-Dadson -1 0 1 2 3 4 5 x Quadratic Graphs - Extension 3) a. Complete the following table for y = 2x2 – 3x – 4 and plot the graph on the opposite grid. x -1 0 1 2 3 x2 2x2 -3x -4 y b. Write down the coordinates of the lowest point of the graph. c. Build your own table for y = -x2 -2x + 4 d. Draw the graph of y = -x2 -2x + 4 on the same grid opposite. y 5 4 3 2 1 -3 -2 -1 0 -1 1 2 3 4 5 x 6 -2 -3 -4 -5 -6 -7 -8 -9 -1 0 -1 1 e. What can you say about the shapes of the two graphs and why? 4) Below is a table of values for equation y = x2 + 4x – 1 x -5 -4 -3 -2 -1 0 1 2 y 4 -4 a. Fill in the missing values of y in the table. b. On the opposite grid, draw the graph of y = x2 + 4x – 1 c. From the graph estimate the values of x for which y = 2 x = ................. x = ................... J. Mills-Dadson -1 2 y 12 11 10 9 8 7 6 5 4 3 2 1 -6 -5 -4 -3 -2 -1 0 -1 -2 -3 -4 -5 -6 -7 -8 1 2 3 x