Math 2 Unit 7 Review 2023

Which table represents a direct variation?

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Which equation represents an inverse variation?

Ounces of medication vary directly with the weight of the patient. If a 120-pound adult requires 3 ounces of a medication, how many ounces would be needed for a 200-pound adult?

• 2

• 3

• 5

• 9

The width of a rectangle varies inversely with its length.  If the width is 6 when the length is 24, give an equation that shows the relationship.

• y = 4x
• y = 144x
• y = 4/x
• y = 144/x

Given that y varies inversely with x, if x =7 and y = 4, what is y when x = 2?

• 14
• 10
• 2
• -14

Which of these equations shifts a radical equation right 5 times and down once?

• y = √(x - 5) - 1
• y = √(x + 5) - 1
• y = √(x - 5) + 1
• y = √(x + 5) + 1

What are the transformations to the graph compared to the parent function?

• Shifted right 2, shifted up 3, and reflected over the y-axis
• Shifted left 2, shifted up 3, and reflected over the y-axis
• Shifted left 2, shifted up 3, and reflected over the x-axis
• Shifted right 2, shifted up 3, and reflected over the x-axis

What are the transformations of this functions compared to the parent function?

• Shifted right 5, shifted down 2, and reflected over the x-axis
• Reflected over the x-axis, twice as steep, and shifted right 5
• Reflected over the x-axis, twice as steep, and shifted left 5
• Shifted right 5, shifted down 2

What is the domain of this function?
f(x) = √(x-1) -3

• {x ∣ x ≥ 1}
• {x ∣ x ≤ 1}
• {x ∣ x ≥ -3}
• {x ∣ x ≥ -1}

What is the domain of this function?
f(x) = √(x-2) + 4

• {x ∣ x ≥ 4}
• {x ∣ x ≥ -2}
• {x ∣ x ≤ 2}
• {x ∣ x ≥ 2}