Warm UpFind the slope of the ordered pairs:1) (-3,7) & (8, -4)

2) (25, 140) & (35, 200)

Write an equation in slope intercept form x y

0 20

2 30

4 40

6 50

Use the equation to make a conjecture about the number of cellular subscribers in 2015.

Pick 2 sets of order pairs :

Find the slope:

Find the y-intercept:

Write the equation:

Interpret m and b:

Write an equation in the slope-intercept form for the trend line shown in the scatter plot.

Use the equation to make a predication for the year 2020.

The scatterplot shows the number of students how participate in ice hockey.

Objective:Construct scatter plot and analyze trend line using the calculator

#1 New Doc#4 Add Lists & SpreadsheetsTitle A, Nothing in the space below it, then put data in numbered cells…..you MUST hit enter/arrow each time including the last cell you enter Add a new page > Ctrl Doc, 5Tab x Tab yMenu-4 Analyze-6 Regression-1 Show Linear

2. Use the trend line to make prediction about the cost of cookies in 2013.

Construct a scatter plot and write an equation in slope-intercept form.

Use the equation to make a prediction about the life expectancy of a person born in the year 2020.

Warm Up

Number of students in class

Number of books read

10 11

20 18

13 8

27 20

24 25

25 17

1) Using your calculator, find thethe equation for the trendline, rounded to the nearest tenths.

3) Use your equation to predict the number of books read if there are 30 students in a class.

WARM UPUse your calculator to determine the equation for the trend line, rounded to the nearest tenths.

Find the equation for the trend line rounded to the nearest tenths.

If a player only slept 2 hours, how many baskets would the coach predict the player would make?

If a player made 7 baskets, how many hours would he predict they slept?