Lesson 4: Practice Problems
Problem 1
day | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
temperature (degrees F) |
What was the high temperature on Day 7?
On which days was the high temperature 61 degrees?
Is the high temperature a function of the day? Explain how you know.
Is the day a function of the high temperature? Explain how you know.
Problem 2
The amount Lin’s sister earns at her part-time job is proportional to the number of hours she works. She earns $9.60 per hour.
Write an equation in the form
to describe this situation, where represents the hours she works and represents the dollars she earns. Is
a function of ? Explain how you know. Write an equation describing
as a function of .
Problem 3
Use the equation
Problem 4 From Unit 4 Lesson 13
Solve the system of equations: