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Activities 4


4.1)

Which of these functions are proportional? y = x + 90 f(x) = 0.01x g(x) = x2 h(x) = 10000x

4.2)

Which of these function tables describe proportional functions?

a)









x-values 0 1 2 3 4 5 6








y-values 5 6 7 8 9 10 11








b)









x-values 0 1 2 3 4 5 6








y-values 0 4 8 12 16 20 24








c)









x-values 0 1 2 3 4 5 6








y-values 3 6 9 12 15 18 21








d)









x-values 0 1 2 3 4 5 6








y-values 4 6 16 26 36 46 56








4.3)

Which of these graphs show a proportional function?

A line going through (0,0) and (1,5)

(a)

A line going through (0,0.5) and (2,6.5)

(b)


You can find the solutions here.

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Proportional Functions
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Inversely Proportional Functions