8th grade Ch 4 L8

• 2.24 meters per second

• 5 meters per second

• 0.5 meters per second

• 10 meters per second

• Graph the parabola opening upward with vertex at (0,0) and passing through (1,3), (-1,3), (2,12), (-2,12).

• Graph the parabola opening downward with vertex at (0,0) and passing through (1,-3), (-1,-3), (2,-12), (-2,-12).

• Graph the parabola opening upward with vertex at (1,0) and passing through (0,3), (2,3), (3,12), (-1,12).

• Graph the parabola opening upward with vertex at (0,0) and passing through (1,6), (-1,6), (2,24), (-2,24).

• Graph the parabola opening downward with vertex at (0,0) and passing through (1,-5), (-1,-5), (2,-20), (-2,-20).

• Graph the parabola opening upward with vertex at (0,0) and passing through (1,5), (-1,5), (2,20), (-2,20).

• Graph the parabola opening downward with vertex at (1,0) and passing through (0,-5), (2,-5), (3,-20), (1,-20).

• Graph the parabola opening upward with vertex at (0,0) and passing through (1,-5), (-1,-5), (2,-20), (-2,-20).

The graph of a quadratic function opens upward or downward depending on:

• the sign of the leading coefficient

• the value of the constant term

• the number of solutions

• the position of the vertex

• The graph is a parabola opening upwards with vertex at (0,0) and passing through (1,4), (-1,4), (2,16), and (-2,16).

• The graph is a straight line passing through the origin and the point (1,4).

• The graph is a parabola opening downwards with vertex at (0,0) and passing through (1,-4), (-1,-4), (2,-16), and (-2,-16).

• The graph is a circle centered at the origin with radius 4.

• The graph is a parabola opening downwards with vertex at (0,0) and passing through (1,-3), (-1,-3), (2,-12), and (-2,-12).

• The graph is a parabola opening upwards with vertex at (0,0) and passing through (1,3), (-1,3), (2,12), and (-2,12).

• The graph is a straight line passing through the origin with slope -3.

• The graph is a parabola opening downwards with vertex at (1,0) and passing through (0,-3), (2,-3), (-1,-12), and (1,-12).

• The graph is a downward-opening parabola with vertex at (0,196). The penny reaches the water when d = 0, which occurs at t = 3.5 seconds.

• The graph is an upward-opening parabola with vertex at (0,196). The penny reaches the water when d = 0, which occurs at t = 7 seconds.

• The graph is a straight line decreasing from (0,196) to (3.5,0). The penny reaches the water at t = 2 seconds.

• The graph is a downward-opening parabola with vertex at (0,0). The penny reaches the water when d = 0, which occurs at t = 4 seconds.

• The graph is a straight line. Setting A = 7, 7 = 0.25d^2, so d^2 = 21, d ≈ 4.58 feet.

Anna has trim to make a rectangular border for a scrapbook page. The section inside the border is x inches long and (12 - x) inches wide. a. Write a function to represent the area A of the section inside the border.

• A = x + (12 - x)

Anna has trim to make a rectangular border for a scrapbook page. The section inside the border is x inches long and (12 - x) inches wide. What should the dimensions of the section be to enclose the maximum area inside the border?

• The maximum area occurs at x = 6 inches, so the dimensions are 6 inches by 6 inches.

• The maximum area occurs at x = 4 inches, so the dimensions are 4 inches by 8 inches.

• The maximum area occurs at x = 3 inches, so the dimensions are 3 inches by 9 inches.

• The maximum area occurs at x = 2 inches, so the dimensions are 2 inches by 10 inches.