In which choice is y not a function of x? (Which relation is not a function?)
Question 11
11.
The function P(m) = 43 + 0.08m is used to determine the price, P(m), of your phone bill depending on the number of minutes, m, used. What is the price for using 178 minutes?
Question 12
12.
Using the function in question 11,
P(m) = 43 + 0.08m
how many minutes were used if the price of the bill is $62.68?
Question 13
13.
For the function f(x) = x2 + 4x – 1, select the letter that describes the range of f(x) for the domain {-2, 0, 1}.
A. {-13, -1, 4}
B. {-5, -1, 4}
C. {-5, 0, 6}
D. {-13, 0, 2}
Question 14
14.
What is the value of g(3) for the function g(x) = 2x -3?
Question 15
15.
The function S(w) = 9w + 45 models the amount of money Jen saves, S(w) after a given number of weeks, w. How many weeks will it take Jen to save $126?
Question 16
16.
The function P(x) = 5x – 25 models the amount of profit made from selling bags of coffee, x. How much profit will you make if you sell 12 bags of coffee?
Question 17
17.
The function f(x) = 3x + 10 models the yearly membership of an online movie rental club, where x is the number of movies rented.
In one year Rachel rented 21 movies. How much was Rachel’s membership?
Question 18
18.
The function f(x) = 3x + 10 models the yearly membership of an online movie rental club, where x is the number of movies rented.
In one year, Toby rented twice the amount of movies as Rachel. How much more did Toby pay in one year than Rachel? (Use your answer from #17)