1. Matching Equations and Graphs
4.4

2. Page 183

3. Example 1
Match the equations to the graphs. Find at THREE points for each graph. y = 3x + 3 x + y = 3 y = 3x - 3

4. Example 2
Match the equations to the graphs. Find at THREE points for each graph. y = x y = 2x y = -3x

5. Example 3
Which graph on this grid has the equation y = 3x – 4?

6. Using Graphs to Estimate Values
4.5
Quiz Coming Soon!

7. Review

8. Example 1 How much does 2L cost?
The following graph shows the relation between the cost of soda and the amount purchased.
How much does 2L cost?

9. Definition
Interpolation – _________________ values that lie between 2 data points on a graph.

10. Example 1 How much does 8L cost?
The following graph shows the relation between the cost of soda and the amount purchased.
How much does 8L cost?

11. Definition
Extrapolation – Estimating values that lie ____________ data points on a graph.

12. Example 2
Teacher’s Popularity

13. Example 3 What is the distance travelled at 1.5 hours?
How long will it take to travel 300 km?
How long would it take to travel 450 km?

14. Example 3 What is the distance travelled at 1.5 hours?
How long will it take to travel 300 km?
How long would it take to travel 450 km?

15. Remember…
1) We are assuming the pattern remains the same. 2) Interpolation and Extrapolation give us estimations and not exact values.

16. Unit 4 Review Study Guide: Determine expressions from problems
Express data in four different ways:
Table, graph, words and expression
For graph you must have axis labels with units, title
Use expressions to solve problems
Match graphs to equations
Extrapolate and Interpolate
Page 201:
#1, 4, 8 (graph on one graph), 13, 14