Unit 7 Practice Test

• 7,4

• 7, 4/3

• -7, 4/3

Tags

CCSS.HSF-IF.C.7C

What is the equation of this quadratic function in it’s factored form?

• y=(x-2)(x+3)

• y=(x+2)(x-3)

• y=(x+2)(x-3)(x-6)

• y=(x+3)(x-6)

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

What is the equation of this quadratic function in it’s standard form?

• y= x² -x - 6

• y=x² +5x +6

• y= -x² +3x - 6

• y=(x+2)(x-3)

An apple is catapulted into the air. The function "a" given by the equation a(t)= 20 + 65t - 16t² models the apple's height, in feet, t seconds after it was launched.

Select all statements that are true about this situation.

• The value t=5 does not belong in the domain of this function.

• The apple reached the maximum height at about 2 seconds..

• The apple hit the ground after 4.35 seconds.

• The apple hit the ground at 20 feet.

Draw a sketch of a quadratic function that:

Has x intercepts at : x=0 and x=4

Has a vertex at : ( 2, -5)

Write this equation in standard form: y= (2x-1)(x+7)

Sketch the graph of the function:

f(x)=x(x+2)

Include: x intercepts

y intercept

vertex

A company finds that if they charge x dollars for a cellphone, it can expect to sell 50-x phones. They use the function r(x)= x(50-x) to model the expected revenue, r, in dollars, at x dollars each.

Use graphing technology to answer the following questions: What are the x intercepts? What do they mean in this situation?