Writing a Function Rule
A) Company A offers unlimited minutes and texts for a flat fee of $50 per month and charges $1.50 for each GB of data used per month.
1.50x + 50
A sporting goods store is having a 15% off sale on all items. Which functions can be used to find the sale price of an item that has an original price of x? You may choose more than one correct answer.
ƒ( x) = x - .15 x Sale = Original - .15(Original)
If the points (0, 0), (-1, 1), and (-2, 2) lie on the graph of function h, then which of the following rules could represent the function?
h(x) = | x |
The graph below shows the total cost of an internet subscription, C, as it relates to the number of internet hours used, h. How much does the company charge per hour?
5 dollars per hour.
B) Company B offers unlimited minutes and texts for a flat fee of $35 per month and charges $5.00 for each GB of data used per month.
5x + 35
Which equation could represent "the area of a square as a function of a side"?
A(s) = s^2
Which equation could represent "the total cost of popcorn at the movie that sells for $2.50 each if p packages of popcorn are purchased"?
C(p) = 2.50p
Sarah is renting a car for her weekend trip to the mountains. She has to pay an initial cost for the car, then an amount per mile which determines her total rental cost. The graph below shows the total cost f(x) of the rental car as it relates to the number of miles driven x.
f(x) = 0.25x + 25
Which of the following functions represents a cell phone bill if there is a monthly charge of 20 dollars plus 6 cents for each minute of use?
f(x) = 20 + 0.06x
Which of the following rules represents the function graphed?
f(x) = x
Which of the following equations represents the graph shown?
f(x) = x + 2
To go bowling, it costs $2 to rent shoes and then $3.25 for each game bowled. Which of the following functions gives the total cost to bowl g games?
f(g) = 2 + 3.25g
Which of the following rules represents the function shown in the table?
f(n) = 3n
Jeans are on sale for 20% off the regular price. Which function would give you the total cost for purchasing a pair of jeans that costs x dollars?
f(x) = x - 0.2x
