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1.5 G RAPHING Q UADRATIC F UNCTIONS BY U SING T RANSFORMATIONS
Graph using the graph of
You move the key points of To shift to the right 3 spaces you add 3 to all of the x values! xy And then graph the new set of points!
(1, 4) (2, 1) (3, 0) (4, 1) (5, 4)
Graph This is a shift to the left 5 spaces. To shift to the left 5 spaces you subtract 5 from all of the x values! xy And then graph the new set of points!
Shift LEFT 5 Units (-7, 4) (-6, 1) (-5, 0) (-4, 1) (-3, 4)
Graph This is a shift down 4 spaces. To shift down 4 spaces you subtract 4 from all of the y values! xy And then graph the new set of points!
Shift DOWN 4 Units (-2, 0) (-1, -3) (0, -4) (1, -3) (2, 0)
Graph This is a shift up 6 spaces. To shift up 6 spaces you add 6 to all of the y values! xy And then graph the new set of points!
Shift UP 6 Units (-2,10) (-1, 7) (0, 6) (1, 7) (2, 10)
Graph This is a vertical stretch by a factor of 2. To stretch the parabola you multipy all of the y values by 2 ! xy And then graph the new set of points!
Strectch by a factor of 2 (-2,8) (-1, 2) (0, 0) (1, 2) (2, 8)
Graph This is a vertical compression by a factor of one half. To compress the parabola you multipy all of the y values by 0.5 ! (or divide them all by 2!) xy And then graph the new set of points!
Compress by a factor of (-2, 2) (-1, 0.5) (0, 0) (1, 0.5) (2, 2)
Graph This is a reflection in the x-axis. To reflect the parabola you multipy all of the y values by -1 ! xy And then graph the new set of points!
Reflect in the x-axis (-1, -1) (-2, -4) (0, 0) (2, -4) (1, -1)
Graph xy reflect in the x-axis and stretch by a factor of 2 shift the parabola up And then graph the new set of points!
(-1, 3) (-2, -3) (0, 5) (2, -3) (1, 3)
Graph xy shift the parabola left 7 shift the parabola down And then graph the new set of points!
(-9, 1) (-8, -2) (-7, -3) (-6, -2) (-5, 1)
Graph xy Compress by a factor of 0.25 shift the parabola right And then graph the new set of points!
(6, 1) (7, 0.25) (8, 0) (9, 0.25) (10, 1)
H OMEWORK : P AGE 47 #5 – 12
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