Problem 31 :
The graph below shows the amount of profit, y, a company makes from selling x units of merchandise.
How many units of merchandise does the company need to sell to make the maximum profit?
A. 100 B. 300 C. 500
Problem 32 :
The quadrilateral shown below has vertices at (-8, 0), (-4, -4), (0, 8) and (4, 4).
What is the area of the quadrilateral?
A. 32 units^{2 }B. 45 units^{2 }C. 64 units^{2}
Problem 33 :
Which equation has a graph which is perpendicular to the line y = -2x and which passes through the point (-2, 3)?
A. x - 2y = 8 B. x + 2y = -8 C. x - 2y = -8
Problem 34 :
The cost to mail a box of textbooks can be modeled by the function f(x) = 1.75x + 5.25, where x is the number of books mailed. What does the y-intercept of the function represent?
A. the cost to mail a box with no textbooks
B. the number of books mailed
C. the cost per book
Problem 35 :
Which situation could be best modeled with an exponential function?
A. the value of a car that loses 6% of its value per year.
B. the cost to purchase different weights of bananas at a store.
C. the total number of miles run by a person who runs 8 miles per day.
Problem 36 :
The function f(x) = 4(2.0)^{x} models the population of rabbits on a farm after x months with no removal. The function g(x) = 2(2.0)^{x} models the number of rabbits removed from the population after x months. Which function, h(x), ,models the total number of rabbits on the farm after x months?
A. h(x) = 2(1.0)^{x }B. h(x) = 2(2.0)^{x }C. h(x) = 6(2.0)^{x}
Problem 37 :
Fred has $200. Each week he will save an additional $50. If Fred does not spend any of the money, how many weeks will it take for Fred to have $650?
A. 9 B. 13 C. 17
Problem 38 :
Problem 39 :
The table below shows the cost of a season ticket to an amusement park for various years.
What is represented by the y-intercept of the line of best fit for this data set?
A. the predicted average change in ticket price per year.
B. the predicted number of years per $1 increase in ticket price.
C. the predicted price of a ticket in 1990.
Problem 40 :
Kerry wants to simplify the following:
Which of the following is the correct result?
A. 4x B. 4x + 1 C. 20x^{2 }D. 20x^{2} + 1
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