1. Chapter 2.1.2
Rebound Ratios

2. Algebra Review: Find the POI. f(x) = 1.5x2- 9x + 11.5
g(x) = -0.2x2- 0.4x + 2.8

3. Find the missing terms and write a rule for each exponential function.
Year x
The amount of money in the bank, y
$5,000 1
$5,100 2 5 10
Month X
Population Y
200 1
350 2 5 10

4. How High Will It Bounce?
Many games depend on how a ball bounces. For example, if different basketballs rebound differently, one basketball would bounce differently off of a backboard than another would, and this could cause basketball players to miss their shots. For this reason, manufacturers have to make balls’ bounciness conform to specific standard.
Listed on the next slides are the “bounciness” standards for different kinds of balls.

5. 2-20 continued
Tennis Balls: Must Rebound approximately 111 cm when dropped from 200 cm.
What is the rebounding ratio?
=0.555
Soccer balls: Must rebound approximately 120 cm when dropped from 200cm onto a steel plate.
=0.6

6. NOW DETERMINE THE REBOUNDING RATIO FOR THE FOLLOWING BALLS
NOW DETERMINE THE REBOUNDING RATIO FOR THE FOLLOWING BALLS. Basketballs: Must rebound approximately 53.5 inches when dropped from 72 inches onto a wooden floor. Squash Balls: Must rebound approximately 29.5 inches when dropped from 100 inches onto a steel plate at 70 degrees Fahrenheit.
0.743
0.295

7. A new bouncing ball
STARTING HEIGHT CM
REBOUND HEIGHT
200
160
100 80 50 40 10 8
Plot these values.
Should the points be connected?
Describe the independent variable
Describe the dependent variable.
State the equation to fit the data.
Should point (0,0) be included?

8. On your own Read and take notes on Methods and Meanings Page 62
Do Review and Preview Pg 62 #26-29 and 37-41