Unit 3 Part 2 REVIEW

Select the graph for y ≥ -3.

• A
• B
• C
• D

Tags

CCSS.HSA.REI.D.12

What would be the effects on the graph of the linear parent function, f(x) is replaced by -3f(x)?

• The graph would horizontally stretch by a factor of 3, and the graph would reflect across the x-axis.

• The graph would shift up 3 units and reflect across the x-axis.

• The graph would vertically stretch by a factor of 3, and the graph would reflect across the x-axis.

• The graph would vertically stretch by a factor of 3, and the graph would reflect across the y-axis.

The graph illustrates the cost for renting a cab at the Blue Cab Company.

How would the graph of the line representing the Blue Cab Company change if its initial fee was changed to $10?

• The x-intercept increases by 10.

• The y-intercept increases by 10.

• The slope becomes less steep.

• The slope becomes steeper.

What is the effect on the graph of the linear parent function, f(x), when f(x) is replaced by f(x+7)?

• The graph of the line becomes steeper.

• The graph of the line shifts horizontally right 7 units.

• The graph os the line shifts vertically up 7 units.

• The graph of the line shifts horizontally left 7 units.

Jane wanted to save her earnings for the newest version of the iPhone. She already owed her mother $5.00. If she earned $7.00 per week and saved it all, the equation model for this situation would be f(x) = 7x - 5, where f(x) represents total amount saved and x represents the number id weeks Jane has worked and saved her earnings. Which of the following statements represents the effects of the 7 and 5 on the graph of the linear parent function, f(x) = x?

• The 7 decreases the rate of change causing it to be less steep, and the 5 shifts the line down making the y-intercept (0,-5).

• The 7 increases the rate of change causing it to be steeper, and the 5 shifts the line up making the y-intercept (0,5).

• The 7 increases the rate of change causing it to be steeper, and the 5 shifts the line down making the y-intercept (0,-5).

• The 7 decreases the rate of change causing it to be less steep, and the 5 shifts the line up making the y-intercept (0,5).

Find the slope of the line that passes through:

(-12, -5) and (0, -8). Leave answer in decimal form.

• 0.25

• -0.25

• 4

• -4

What is the slope?

• 0.25
• -0.25
• 5
• 4

Tags

CCSS.8.EE.B.5

find the slope

• 3/2
• -3/2
• (-0,-3)
• none of the above

Tags

CCSS.8.EE.B.5

Over the summer Alex worked and saved $24,000 to use when he goes to college in the fall. Alex plans to take $400 each month from this savings account to pay for some of his college expenses.

Which equation represents this scenario?

• y = -400x + 24,000

• y = 400x + 24,000

• y = -400x - 24,000

• y = 400x - 24,000

Over the summer Alex worked and saved $24,000 to use when he goes to college in the fall. Alex plans to take $400 each month from this savings account to pay for some of his college expenses.

What is the y-intercept and what does it represent?

• (24000, 0) . He starts with $24,000 in his account.

• (0, 24000). He starts with $24,000 in his account.

• (0, 400). He starts with $300 in his account.

• (0,-400). He starts with $300 in his account.