Which table represents a linear function?

For this case, what you should know is that a linear function has a constant average rate of change, because its slope is constant.
 Table number two from left to right represents a linear function.
 The line is:
 y-yo = m (x-xo)
 Where
 The slope is:
 m = (0 - (- 5)) / (2-1)
 m = 5/1
 m = 5
 The line is:
 y-0 = 5 (x-2)
 Rewriting:
 y = 5x-10
 
 Table two from left to right.
 The equation is:
 y = 5x-10

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