CCSS.Math.Content.HSF.BF.A.1

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x
• y = 15(1.35)^x
• y = 15(0.35)^x
• y = 35(1.15)^x

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CCSS.Math.Content.HSF.BF.A.1

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y=6(0.14)^x
• y=6(1+14)^x
• y=6(1.14)^x
• y=6(0.86)^x

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CCSS.Math.Content.HSF.BF.A.1

Since January 1980, the population of the city of Brownville has grown according to the mathematical model y=720,500(1.022)^x, where x is the number of years since January 1980. What is the was the population of Brownville in 1980?

• 102.2 people
• 720,500 people
• 1.022 people
• 1022 people

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CCSS.Math.Content.HSF.BF.A.1

 Y varies inversely with x, and y is 0.5 when x is 4. Which equation represents this situation?

• y=2x
• y=2/x
• y=4x
• y=x/2

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CCSS.Math.Content.HSF.BF.A.1

Given f(x)= -3x+7 and g(x)=2x² - 8, find f(g(x)).

• f(g(x))= -6x²+31
• f(g(x))= -6x²+24
• f(g(x))=18x²-84x+6
• f(g(x))=9x²-42x-1

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CCSS.Math.Content.HSF.BF.A.1

Principal: $5000
Interest Rate: 3.75%
Time: 25 years
Compounded Monthly
State the future account balance.

• $12712.31
• $12,749.30
• $12,657.59
• $12550.84

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CCSS.Math.Content.HSF.BF.A.1

The graph shows a line of best fit for data collected on the amount of income earned by lawn companies in relation to the number of yards mowed.  What is the equation of the line of best fit?

• y = (3/2) x
• y = 30x
• y = 30x + 300
• y = (3/2)x + 300

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CCSS.Math.Content.HSF.BF.A.1

Suppose y varies inversely with x.
If y = 150 when x = 2, find y when x = 25.

• 300
• 75
• 1,875
• 12

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CCSS.Math.Content.HSF.BF.A.1

y = 1/2x - 1

• slope: 1/2   y-intercept:  -1 
• slope: 2/1   y-intercept:  -1
• slope: 3   y-intercept:  -3 
• slope: 2  y-intercept:  5 

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CCSS.Math.Content.HSF.BF.A.1

The iPhone X is valued at $1000 upon purchase. The value is expected to decrease by 14% each year. Which function matches the situation? Let Cost (C) be a function of time (t)

• C(t)=1000-0.14t
• C(t)=1000(.14)^t
• C(t)=1000(.86)^t
• C(t)=1000-0.86t

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CCSS.Math.Content.HSF.BF.A.1