lesson 84: graphing proportional relationships/linear...
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AMPs Lesson 84 Graphing Propotional Relationships Linear Equations.notebook
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May 19, 2020
Lesson 84: Graphing Proportional Relationships/Linear Equations
• Proportional : The data on a graph is proportional if the data is a straight line when graphed and it goes through the origin (0,0).
> The equation for the data is y = kx where k = the constant of proportionality.
AMPs Lesson 84 Graphing Propotional Relationships Linear Equations.notebook
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May 19, 2020
The first step in graphing is to complete the table
Use the given input "x", and the rule "y=2x+1"
Solve for the output
x y=2x+1 y (x,y)
AMPs Lesson 84 Graphing Propotional Relationships Linear Equations.notebook
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May 19, 2020
Example:
1. y = 3x + 1
x 3x+1 y (x,y)
AMPs Lesson 84 Graphing Propotional Relationships Linear Equations.notebook
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May 19, 2020
2. y = x2 1
x x21 y (x,y)
AMPs Lesson 84 Graphing Propotional Relationships Linear Equations.notebook
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• Function : A function is a rule that relates two quantities so that each "input" value corresponds to exactly one "output".
• Domain : The set of all possible input values
• Range : The set of all possible output values
Check out this quick video:
https://virtualnerd.com/prealgebra/linearfunctionsgraphing/functions/relationsvsfunctions/identifydifference
AMPs Lesson 84 Graphing Propotional Relationships Linear Equations.notebook
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May 19, 2020
• Functions can be expressed in many ways...
1. Tables
2. Graphs
3. Equations
y = 2x 1
AMPs Lesson 84 Graphing Propotional Relationships Linear Equations.notebook
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May 19, 2020
Based on what we know about relations and functions, determine whether each of the following relations is a function.
1. x y 2. x y 3. x y
3 2 1 4 2 5
2 6 0 5 5 2
6 3 3 4 0 5
3 7 4 6 1 2
AMPs Lesson 84 Graphing Propotional Relationships Linear Equations.notebook
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May 19, 2020
Linear Equations
• Linear Equation : An equation whose solutions fall on a line. All points on the line are solutions to the equation.
> If an equation is linear, a constant change in the xvalue corresponds to a constant change in the yvalue
> The constant change is the constant of proportionality (k)