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Academy Algebra II. 4.2: Building Linear Functions From Data HW: p.290-291(3-8 all,18 – by hand,20 – calc) Bring your graphing calculator to class on Monday Unit 2 Test: Wednesday (3.1,3.2,2.2,2.3,2.5,4.2).

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academy algebra ii

Academy Algebra II

4.2: Building Linear Functions From Data

HW: p.290-291(3-8 all,18 – by hand,20 – calc)

Bring your graphing calculator to class on Monday

Unit 2 Test: Wednesday (3.1,3.2,2.2,2.3,2.5,4.2)

slide2

4.2: Do Now: Determine whether the relationship between the two variables is linear or nonlinear.

1. 2.

3. 4.

s catter plot lobf by hand
Scatter plot & LOBF by hand.

Apparent Temperature

Relative Humidity

sketch a scatter plot using ti 89
Sketch a scatter plot using TI-89.

Press APPS, select Data/Matrix Editor. 3: New.

Type: Data, Folder: Main. Variable (make up a name).

ENTER, ENTER. Enter data in c1 and c2.

Press F2 for Plot Setup. F1 for Define.

Plot type: Scatter, Mark: Box, x = type c1 in this box ALPHA )1, y = c2. ENTER, ENTER.

sketch a scatter plot using ti 891
Sketch a scatter plot using TI-89.

Display the Y= by pressing <green diamond> F1.

Clear any existing equations in y1, y2, etc.

Adjust window and view graph of scatter plot.

-or- press F2, select 9: ZoomData

sketch a scatter plot using ti 892
Sketch a scatter plot using TI-89.

Press APPS, select Data/Matrix Editor. 1: Current.

Press F5 for Calc menu.

Calculation type: LinReg. x = c1, y = c2.

Store RegEq to: y1(x). Press ENTER to save.

A screen will appear with the equation (write this down if you want the equation). Press ENTER and this equation will automatically go in y1 for the graph. Press <green diamond> F3 to view LOBF.

sketch a scatter plot using ti 83 84
Sketch a scatter plot using TI-83/84.

Press STAT, select Edit.

If needed, clear lists: arrow up to highlight

L1, press CLEAR and ENTER.

Enter data into L1 and L2.

Turn plots on/off – STATPLOT: Press 2nd Y= for

Statplot. Select Plot 1. Turn Plot on,

X list: L1, Y list: L2.

sketch a scatter plot using ti 83 841
Sketch a scatter plot using TI-83/84.

Display the Y= by pressing Y=.

Clear any existing equations in y1, y2, etc.

Adjust window and view graph of scatter plot.

-or- press ZOOM and select 9: ZoomStat.

sketch a scatter plot using ti 83 842
Sketch a scatter plot using TI-83/84.

Press STAT, arrow over to CALC, select 4:LinReg –

press 2nd 1 to select L1, type a comma,

press 2nd 2 to select L2, type a comma,

press VARS, arrow over to Y-VARS, select

Function, select Y1. Press ENTER.

A screen will appear with the equation (write this down if you want the equation). The equation will automatically go into y1. Press GRAPH to view LOBF.