Go over your quizzes record grades, put away in binder……. August 26, 2011

Go over your quizzesrecord grades,

put away in binder…….

August 26, 2011

Linear Function Review

August 26, 2011

Find the slope

1) (-2,1) (3,5)

2) (4,2) (-6,2)

3) (-3,5) (-3,-1)

2 1

2 1

y ym

x x

Slope-Intercept Form

y = mx + b

Linear Equations

• Always graph the y-intercept first!

• Slopes must be fractions when graphing.

• The numerator (top) of the fraction is the rise.

• The denominator (bottom) of the fraction is the run.

4) Graph y = 2

23x

5) Graph y = 2x + 7

Horizontal Lines: HOY

x

yHorizontal Lines have 0 slope; therefore their equations are y = 0x + b or y = b

6) example: Write an equation of the line that passes through (-5, 5) and (7, 5).

y = 5

(-5, 5) (7, 5)

Vertical Lines: VUX

x

yVertical Line have undefined slope. Their equation does not start with y. Their equation is x = #

7) example: Write an equation of the line that passes through (3, 6) and (3, -3).

x = 3(3, -3)

(3, 6)

Standard Form:

Ax + By = Cyou can NOT tell the y-int or the slope FROM this form.

Linear Equations

Standard Form: 3x - 2y = 18you CAN TELL the x and y intercepts from this form. Use the cover up method…8) Find the x and y intercepts

Linear Equations

Graph the following ACCURATELY on graph paper!9) y = 3x – 4

10) y = -2x + 4

11) 3x – 2y = 8

12) 5y + 2x = -10

13) 3x – 4y = 4

14) -x – 2y = 10

15) y = -3

16) x = 6

Today’s Vocabulary:

slope, slope-intercept form, standard form, horizontal lines, vertical lines, x and y intercepts

Homework

WS 2