1.Graph the function f (x) = x² + 4x - 12 on the coordinate plane.

(a)What are the x-intercepts?

(b)What is the y-intercept?

(c)What is the maximum or minimum value?

Rubric:

Points Concept Addressed

3 Graphs the function and identifies the x-intercepts.

1 Identifies the y-intercept.

1 Identifies the minimum value.

2.Convert this quadratic function to vertex form.

y = x² + 14x +48

Then determine the minimum value of the function.

Rubric:

Points Concept Addressed

3 Correctly completes the square to convert the function into vertex form.

2 Correctly determines the minimum value of the function.

3.A rocket is launched vertically from the ground with an initial velocity of 64 ft / sec.

(a)List a quadratic function h(t) that shows the height, in feet, of the rocket t seconds after it was launched.

(b)Graph h(t) on the coordinate plane.

(c)Use your graph from Part 3(b) to determine the rocket's maximum height, the amount of time it took to reach its maximum height, and the amount of time it was in the air.

Points Concept Addressed

3 Writes and graphs the quadratic function.

2 Determines the rocket's maximum height, the amount of time it took to reach its maximum height, and the amount of time it was in the air.

Thank you