Algebra 1 | Unit 5 | Lesson 20: Changes over Equal Intervals | Practice Problems

Whenever the input of a function f increases by 1, the output increases by 5. Which of these equations could define f?

The two lines on the coordinate plane are graphs of functions f and g. Use the graph to explain why the value of f increases by 2 each time the input x increases by 1. Use the graph to explain why the value of g increases by 2 each time the input x increases by 1.

The average price of a gallon of regular gasoline in 2016 was $2.14. In 2017, the average price was $2.42 a gallon—an increase of 13%. At that rate, what will the average price of gasoline be in 2020?

A credit card charges a 14% annual nominal interest rate and has a balance of $500. If no payments are made and interest is compounded quarterly, which expression could be used to calculate the account balance, in dollars, in 3 years?

Here are equations that define four linear functions. For each function, write a verbal description of what is done to the input to get the output, and then write the inverse function.