Quadratic Functions Quiz

The graph of a quadratic function is a smooth curve called _____.

• Circle

• Line

• V-shape

• Parabola

Which of the following is an example of a graph of a quadratic function?

• [Graph a]

• [Graph b]

• [Graph c]

• [Graph d]

Which of the following situations does NOT represent a quadratic function?

• A train travels 45 miles every hour after departing the station.

• A toy rocket is fired into the air from the top of a barn. Its height (h) above the ground in yards after t seconds is given by the function h(t) = -5t² + 10t + 20.

• h(t) = -4.9t² + 8t + 5 represents Jeremiah's height (h) in meters above the water t seconds after he leaves the diving board.

• Your height in meters relative to the height of the ski jump after t seconds is given by h(t) = -5t² + 12t.

The following table of values represent a quadratic function EXCEPT _______.

• [Table a]

• [Table b]

• [Table c]

• [Table d]

“A function represents a table of values having the differences of the y values. If the second differences of the y values are equal, then the given function is a quadratic function.” Is the statement true or false?

• True

• False

When you have a quadratic function in the form y = ax² + bx + c, if a > 0, then the parabola opens _____?

• upward

• downward

• forward

• backward

When you have a quadratic function in the form y = ax² + bx + c, if a < 0, then the parabola opens _____?

• upward

• downward

• forward

• backward

• -23 and 7

• -13 and 7

• -23 and 1

• 23 and 7

Which quadratic function opens downward?

Which is a quadratic function that opens upward?