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