# Lesson 4

Tables, Equations, and Graphs of Functions

The practice problem answers are available at IM Certified Partner LearnZillion (requires a district subscription) or without a subscription here (requires registration).

### Problem 1

The graph and the table show the high temperatures in a city over a 10-day period.

 day temperature (degrees F) 1 2 3 4 5 6 7 8 9 10 60 61 63 61 62 61 60 65 67 63
1. What was the high temperature on Day 7?

2. On which days was the high temperature 61 degrees?

3. Is the high temperature a function of the day? Explain how you know.

4. Is the day a function of the high temperature? Explain how you know.

### Problem 4

Solve the system of equations: $$\begin{cases} y=7x+10 \\ y=\text-4x-23 \\ \end{cases}$$