linear and nonlinear functions identifying functions on tables, graphs, and equations. april 27,...
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Linear and Nonlinear Functions
Identifying functions
on tables, graphs, and equations.
April 27, 2015
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Warm Up
Graph y = 2x + 1
Rewrite the linear equation 3y + x = 9 to its slope-intercept form or the “y = ” form.
What is the linear equation for this graph?
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Compare and Contrast
Yards to Feet
Num
ber
of F
eet
Number of Yards
Yards to Square Yards
Length of a Side of a Square Yard
Are
a of
Squ
are
(yd2 )
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Tables: Linear or Nonlinear
linear
nonlinear
x y
2 50
4 35
6 20
8 5
x y
1 1
4 16
7 49
10 100
Is the rate of change constant (the same)?
+2
+2
+2
-15
-15
-15
+3
+3
+3
+15
+33
+51
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Identify: Linear or Nonlinear Table?
x y
0 20
5 16
10 12
15 8
x 0 2 4 6
y 0 2 8 18
linear
nonlinear
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Graphs: Linear or Nonlinear
Is the graph a straight line?
linear linear nonlinear
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Identify: Linear or Nonlinear Graph?
linear linear nonlinear
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Equations: Linear or Nonlinear
REMEMBER: x1 = x and x0 = 1
In “y = ” form, is x raised to a power of 1 or 0?
Does x appear in the numerator?
y = x + 4y = 6/x
y = 4y = x3 + 1
y = ½ xlinear
nonlinear
linear
nonlinear
linear
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Identify:Linear or Nonlinear Equation?
y = 2/x + 5y = x2 + 8y = .6x1 y = + 13x2
linear linearnonlinear nonlinear
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Pointers to Keep in Mind
A graph is linear if it is a straight line.
A table is linear if the rate of change is constant.
There is a common difference.
An equation is linear if the power of x is either 1 or 0 and it appears in the numerator.
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PowerPoint Wrap UP
Identify if linear or nonlinear.
1. Table A
2. Graph
3. Equation x 3 6 9 12
y 12 10 8 6
a b c
y = + 58x