Construct Functions

• Rate of Change: $20, Initial Value: $3

• Rate of Change: $3, Initial Value: $8

• Rate of Change: $8, Initial Value: $20

The initial value is the _________________ in a linear function.

• Slope

• X-value

• Y-value

• Y-Intercept

The graph shows the total cost for a lawn mowing service to mow a lawn. Which equation represents this situation?

• y = 6x + 28

• y = 1x + 20

• y = 8x + 20

• y = 8x + 36

The trade-in value, V, of a certain model of automobile can be determined using the function V(x)=25000-0.25x, where x is the mileage. Which of the following statements is the best interpretation of the slope?

• The value of the car increases as the mileage increases.

• The selling price of the car when it is new is $25,000.

• The trade-in value of the car decreases $4 for every additional mile driven.

• The trade-in value of the car decreases $1 for every additional 4 miles driven.

• A.
• B.
• C.
• D.

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Sam joins a chocolate club for $22.  He pays $0.35 per ounce of chocolate after he has paid the membership fee. What function represents this situation?

• f(x) = 0.35y + 22

• f(x) = 0.35x - 22

• f(y) = 0.35x + 22

• f(x) = 0.35x +22

Which of the following statements are true about the function g(x)?  Select all that apply.

• The slope of the graph is -2.

• The function g(x) is an exponential function.

• When x increases by1, g(x) decreases by a factor of -2.

• The function can be represented by the equation g(x) = -2x.

• The function can be represented by the equation g(x) = -2x + 5.

Which function represents Walter's situation?

• y = 6x

• y = 6

• y = 8

• y = 8x

Write an equation for the cleaning cost, y, for the number of hours, x. Put in y = mx + b form.

• y = 12x + 20

• y = 20x + 8

• y = 8x

• y = 8x + 20

Write an equation in y = mx + b form for the cost, y, to belong to the gym for x months.

• y = 35x + 40

• y = 40x + 35

• y = 35 x + 70

• y = 75x