Respuesta :

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To find the rate of change, do:
[tex] \frac{ y_{1} - y_{2} }{ x_{1} - x_{2} } [/tex]

1) 4-2 / 2-1 = 2

2) 8-4 / 3-2 = 4

3) 16-8 / 4-3 = 8