Identifying Linear Functions Worksheet With Answers Page 2
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25-1.3 - Graphing linear functions
Examples: Tell whether each function is linear. If so, graph the function.
y
2
y
x
3
y
x
y
5
x
9
12
5-1.4 - Application
The relationship between human years and dog years is given by the function y = 7x. Graph this function and
give it domain and range.
Usually in a linear function the domain and rang can be all real numbers. However, sometimes we have to limit
one or the other or both.
y
70
x
0
0
10
The domain would be all numbers greater than zero since you can not be alive for a negative number of years.
The range would also be all numbers greater than zero for the same reason.
Practice B #'s 1, 3, 4, 5
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