Quiz Review

Which of the following is the rate of change in the graph shown?

Answer explanation

Rate of Change is the same as Slope

Change in y OVER change is x

Vertical change OVER horizontal change

Tags

CCSS.8.EE.B.5

• 6

• 8

• -10

• -28

Answer explanation

Since the input is -3 we substitue -3 into the equation as x (input is always x).

The math looks like:

2 (-3) ² - 10

2 (9) - 10

18 - 10 = 8

Tags

CCSS.HSF.IF.A.2

The set of ordered pairs (-2,7) (3,6) (5,2) (9,-1) defines y as a function of x. which of the following values is not in the domain of the function?

• 9

• 5

• 6

• -2

Answer explanation

The domain the set of all x values in a function.

Remember and ordered pair always read:

(x, y)

So the domain in all the first numbers.

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Maria is driving on a long trip where she starts with 15.8 gallons of gasoline in her car. Her car uses 1.6 gallons for every hour that Maria is driving. Which equation below properly models the amount of gasoline Maria has remaining in her car, g, as a function of the number of hours, h, she has been driving?

• g = -15.8h + 1.6

• g = 1.6h + 15.8

• g = 15.8h - 1.6

• g = -1.6h + 15.8

Tags

CCSS.HSF-BF.A.1A

Give the output when the input is 1.

• -7

• 2

• -3

• 6

Answer explanation

What is the mimimum value of this function?

• 1

• -10

• -3

• -7

Is the function increaseing or decreasing from x = 1 to x = 4?

• Increasing

• Decreasing

Find the averatge rate of change over the specified interval shown.

• -3

• 3

• -1

• 1

Tags

CCSS.8.F.B.4

CCSS.HSF.IF.B.6

Find the averatge rate of change over the specified interval shown.

Tags

CCSS.8.F.B.4

CCSS.HSF.IF.B.6

Tia gets paid $34 per month to delier newspapers. She has $125 saved in a bank account and deposits all of her monthly wages from newspaper delivery into this account. Let s be the amount she has saved and m be the months since she started with $125.

Which linear function models her savings, s, as a function of the number of months, m.

• s = 34m + 125

• s = 125 - 34m

• m = 34s + 125

• m = 125 - 34s

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2