10 Questions
| Total Attempts: 495

Questions and Answers

- 1.Which correctly identifies the values of the parameters a, h, and k for the function f(x) = –2(x + 3)^2 + 1
- A.
A = –2, h = 3, k = 1

- B.
A = 2, h = –3, k =–1

- C.
A = –2, h = –3, k = 1

- D.
A = –2, h = –3, k = –1

- 2.What is the equation of this graph
- A.
Y = –x^2 + 3

- B.
Y = –3x^2

- C.
Y = –(x + 3)^2

- D.
Y = –(x – 3)^2

- 3.Which function includes a translation of 3 units left?
- A.
F(x) = (x + 3)^2 + 1

- B.
F(x) = 3x^2 + 1

- C.
F(x) = (x – 3)^2 + 1

- D.
F(x) = (x + 1)^2 – 3

- 4.Consider a parabola P that is congruent to y = x^2 and with vertex at (0, 0). Find the equation of a new parabola that results if P is translated 3 units
- A.
Y = (x + 3)^2 + 4

- B.
Y = (x – 3)^2 + 4

- C.
Y = (x – 4)^2 + 3

- D.
Y = (x – 3)^2 – 4

- 5.The formula for compound interest on $1000at a given interest rate, r, is shown by the function f(r) = 1000(r + 1)^2. What are the values of the parameters a, h, and k for f(r)
- A.
A = 1000, h = 1, k = 0

- B.
A = 1000, h = 0, k = 1

- C.
A = 0, h = 1000, k = 1

- D.
A = 1000, h = –1, k = 0

- 6.Leila dropped a pebble from a bridge that is 100 meters above the river. The function h(t) = –5t^2 + 100 describes the height of the pebble, h(t), in meters, t seconds after the pebble is dropped. Which is the axis of symmetry for the graph of the function?
- A.
X = –5

- B.
X = 0

- C.
X = 5

- D.
X = 100

- 7.Which equation shows a translation of 3 left and vertical compression by a factor of 2 to the graph y = x^2
- A.
Y = 2(x – 3)^2

- B.
Y = 2(x + 3)^2

- C.
Y = ½(x – 3)^2

- D.
Y = ½(x + 3)^2

- 8.Joanne hit a ball straight up into the air. The height of the ball in metres, is given by the function h(t) = –5(t – 3)^2 + 45 t seconds after the ball is hit. In how many seconds will the ball hit the ground?
- A.
3

- B.
6

- C.
9

- D.
45

- 9.Kevin threw a ball straight up with an initial speed of 20 metres of second. The function y = –5(x – 2)^2 + 20 describes the ball’s height, in metres, t seconds after Kevin threw it. What are the coordinates of the vertex?
- A.
(–5,2)

- B.
(2,20)

- C.
(20,2)

- D.
(–5,20)

- 10.Which equation describes a parabola that opens downward, is congruent to y = x^2, and has its vertex at (0, 3)
- A.
Y = (x + 3)^2 – 1

- B.
Y = –x^2 + 3

- C.
Y = –(x – 3)^2

- D.
Y = x^2 + 3

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