1. On Desk: Learning Log: HW: p. 98, #5, 17-18 and SBA packet #7-11
Math CC7/8 – Be Prepared
On Desk:
Pencil
Calculator
Math Journal
TwMM Learning Log
Learning Log:
HW: p. 98, #5, and SBA packet #7-11
Parent Signatures?
TwMM Test – FRI
Quiz Retake – Thursday in class

2. Tasks for Today Warm Up – SBA Review Quick Quiz
Parent sig. by Wednesday!
Retake in class Thursday!
Lesson 4.2– Older and Faster

3. Warm Up
1. Write the equation for a line through the points (2, -9) and (-2, 3). Show work.
2. Write the equation for a line with slope -3 and passing through the point (1, 4). Show work.

7. About = -5 4
It is a negative slope, so as age increases by one year, race time decreases by 1.25 seconds

8. There is a reasonable linear trend, so we could probably predict a race time of close to 20 seconds.

9. Hmmm…
Beyond 18 or so, running speed doesn’t increase much.
Also, the rate of increase might slow since this data would predict a time of 6 or 7 seconds for age 20 – that’s better than the world record!

10. Answers vary…
(10, 20) and (13, 17) don’t seem to fit the model.
These indicate a slower than expected running speed – race time is longer than predicted by the trend line.

11. No…
The point for this player would lie above the line s = h because his arm span is greater than his height.

12. 1. Are age and GPA strongly related for these students? Explain.
No, the scatter plot does not show a strong relationship between these variables - the scatter is NOT clustered along a line.
2. How is your answer supported by the table? By the scatter plot?
Table – high and low GPAs, all ages
Graph – No linear trend