PA Proportional Relationships (Graphing).notebook
Warm­Up
February 03, 2017
Monday 2­6
A proportion is an equation stating two ratios or rates are equal. To solve proportions we can use cross products (or cross multiplication).
Solve each proportion:
#3
#2
#1
7= c
14 12
g = 66
15 90
x=7
4 20
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PA Proportional Relationships (Graphing).notebook
February 03, 2017
Graphing Proportional Relationships
if a graph is a straight line through the origin, the two quantities are proportional.
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PA Proportional Relationships (Graphing).notebook
February 03, 2017
The length of the stretch of a spring is proportional to the weight attached to the end of spring as shown in the graph.
Find and interpret the constant proportionality.
Explain what the points (0,0), (1,5), and (5, 25) represent.
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PA Proportional Relationships (Graphing).notebook
February 03, 2017
Keith plants a seed. Every three days after the seed sprouts he measures the height of the plant. The graph shows his results.
Find and interpret the constant proportionality.
Explain what the points (0,0), (1,2), and (6,12) represent.
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PA Proportional Relationships (Graphing).notebook
February 03, 2017
Textbook p. 215 #1­4
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PA Proportional Relationships (Graphing).notebook
February 03, 2017
Exit Ticket
1) Find the constant of proportionality 2) Explain what the points (0,0) and (25,1)
represent.
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