GM: EVALUATING FUNCTIONS AND PIECEWISE FUNCTIONS

• 12

• 21

• 18

• 24

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CCSS.HSF.IF.A.2

Which of the following represents the function f(x) = 2x - 3?

• a.
• b.
• c.
• d.

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CCSS.8.F.A.1

CCSS.HSF.IF.A.1

A company is selling bubble gum. The function g(x)=3x+4 tells the company how much to charge if someone buys x packages of bubble gum. Find g(8) and tell what it means within the context of the problem.

• g(8)=8. This means that after 8 packages of gum, the company makes P 8.

• g(8)=42. This means that 8 packages of gum costs P 42.

• g(8)=28. This means that 8 packages of gum costs P 28.

• g(8)=24. This means that 8 packages of gum costs P 24.

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CCSS.HSF.IF.A.2

The function c(m) = 1.45m + 3.50 represents the cost of a taxi for m miles.

What does c(7) represent?

• A cost of P 7 to ride the taxi

• The cost to ride 7 miles

• The minimum distance to ride a taxi

• The minimum cost of a taxi

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CCSS.HSF.IF.A.2

What is g(7) if:

• -17
• -13 
• 13       
• 17

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CCSS.HSF.IF.A.2

What is m(-3) if:    

• -3
• 0.5
• 3
• -3.5

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CCSS.HSF.IF.A.2

What is f(13)?

• 34

• 4

• 166

• cannot be determined

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CCSS.HSF.IF.A.2

A school's fair committee wants to sell t-shirts for their school fair. They found a supplier that sells t-shirt for P165 per piece but can charge P15,000 for a bulk order of 100 shirts and P120 for each excess t-shirt after that. Use a piece-wise function to represent the cost in terms of the number of t-shirts purchased.

Which of the following id the correct piecewise function for this problem?

• 
• 
• 
• 

Evaluate the function when x = 4  {HINT: Should you substitute into the top equation or the bottom equation?}

• f(4) = 2(4) - 5 = 3
• f(4) = 2(4) - 5 = -1
• f(4) = ½(4) + 1 = 3
• f(4) = 4

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CCSS.HSF.IF.A.2

Evaluate the function when x = 6 

• f(6) = -5
• f(6) = 4
• f(6) = 2
• f(6) = 7

Tags

CCSS.HSF.IF.A.2