1. Homework: maintenance Sheet #16 (16-30)
Using the given fact, write equations, in slope-intercept form, for the following linear functions.   A line that travels through (8, -4) and m = 1 2
Homework: maintenance Sheet #16 (16-30)
Study!! You will have a maintenance sheet #16 quiz on tomorrow

2. Reference: http://www.blackinventions101.com/blackinventors.html
Emmit McHenry
Emmit McHenry and his partners were ahead in the technology game, but Blacks Business people refuse to join him.
1992: Emmit McHenry created a complex computer code whereby ordinary people can now surf the web or have s without having to study computer science. He created what we know today simply as .com

3. Homework Check 1-15
(3x+4) 2. 3x (3x) D 7. Line B y intercept = -1, positive slope Line D y-intercept = -2, positive slope
8. y = − 3 2 x + 1/2 9. x =6 10. C 11.y = 1 3 x y = 2 3 x y = 2 3 x y = x x = 7

4. Work Session/Guided One thing I already know about
Scatter plots is ____________________
I can describe a relationship as increasing or decreasing, linear or nonlinear, from an equation, table or graph.
I can construct and interpret scatter plots.
I can describe the relationships shown in a scatter-plot (identifying patterns such as clustering, outliers, positive or negative association, linear association, and nonlinear association).

5. Work Session/Guided Video foldable
I can describe a relationship as increasing or decreasing, linear or nonlinear, from an equation, table or graph.
I can construct and interpret scatter plots.
I can describe the relationships shown in a scatter-plot (identifying patterns such as clustering, outliers, positive or negative association, linear association, and nonlinear association).

6. Scatter Plot (foldable)
A scatter plot is a graph of a collection of ordered pairs (x,y).
The graph looks like a bunch of dots, but some of the graphs are a general shape or move in a general direction.

7. Positive Correlation (foldable)
If the x-coordinates and the y- coordinates both increase, then it is POSITIVE CORRELATION.
This means that both are going up, and they are related.

8. Positive Correlation (foldable)
If you look at the age of a child and the child’s height, you will find that as the child gets older, the child gets taller. Because both are going up, it is positive correlation.
Age 1 2 3 4 5 6 7 8
Height “ 25 31 34 36 40 41 47 55

9. Negative Correlation (foldable)
If the x-coordinates and the y- coordinates have one increasing and one decreasing, then it is NEGATIVE CORRELATION.
This means that 1 is going up and 1 is going down, making a downhill graph. This means the two are related as opposites.

10. Negative Correlation(foldable)
If you look at the age of your family’s car and its value, you will find as the car gets older, the car is worth less. This is negative correlation.
Age of car 1 2 3 4 5
Value
$30,000
$27,000
$23,500
$18,700
$15,350

11. No Correlation(foldable)
If there seems to be no pattern, and the points looked scattered, then it is no correlation.
This means the two are not related.

12. No Correlation(foldable)
If you look at the size shoe a baseball player wears, and their batting average, you will find that the shoe size does not make the player better or worse, then are not related.

13. Objective - To plot data points in the coordinate plane and interpret scatter plots.y
Sport Utility Vehicles
(SUVs) Sales in U.S. 5 4 3 2 1
Year
Sales (in Millions)
1991
0.9
1992
1.1
Vehicle Sales (Millions)
1993
1.4
1994
1.6
1995
1.7
1996
2.1
1997
2.4
1998
2.7 x
1999
3.2
Year

14. Scatterplot - a coordinate graph of data points.y
Trend appears linear. 5 4 3 2 1
Trend is increasing.
Vehicle Sales (Millions)
Positive correlation.
Predict the sales in 2001. x
Year

15. Plot the data on the graph such that homework time
is on the y-axis and TV time is on the x-axis..
Time Spent
Watching TV
Time Spent
on Homework
Student
Sam
30 min.
180 min.
Jon
45 min.
150 min.
Lara
120 min.
90 min.
Darren
240 min.
30 min.
Megan
90 min.
90 min.
Pia
150 min.
90 min.
Crystal
180 min.
90 min.

16. Plot the data on the graph such that homework time
is on the y-axis and TV time is on the x-axis. TV
Homework
240
210
180
150
120 90 60 30
30 min.
180 min.
45 min.
150 min.
120 min.
90 min.
Homework
Time on
240 min.
30 min.
90 min.
120 min.
150 min.
120 min.
180 min.
90 min.
Time Watching TV

17. Describe the relationship between time spent on
homework and time spent watching TV.
Trend appears linear.
240
210
180
150
120 90 60 30
Trend is decreasing.
Homework
Time on
Negative correlation.
Time Watching TV

18. Match the scenario with its correct graph
Work Session/ Pairs
Who will finish first?
Match the scenario with its correct graph
I can describe a relationship as increasing or decreasing, linear or nonlinear, from an equation, table or graph.
I can construct and interpret scatter plots.
I can describe the relationships shown in a scatter-plot (identifying patterns such as clustering, outliers, positive or negative association, linear association, and nonlinear association).

19. Work Session Construct a scatterplot How many hours do you study?
How many hours do you watch TV?
I see dots handout (Think/Do-Pair-Share)
I can describe a relationship as increasing or decreasing, linear or nonlinear, from an equation, table or graph.
I can construct and interpret scatter plots.
I can describe the relationships shown in a scatter-plot (identifying patterns such as clustering, outliers, positive or negative association, linear association, and nonlinear association).

20. Which scatterplots below show a linear trend?
Negative
Correlation
Positive
Correlation b) d) f)
Constant
Correlation