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24 July, 02:45

1. For the data in the table does y vary directly with x if it does write an equation for the direct variation.

X|Y

8|13

16|26

24|39

+4
Answers (1)
  1. 24 July, 03:49
    0
    Yes

    slope = (26 - 13) / (16-8) = 13/8

    y = mx + b passing (8,13)

    13 = 13/8 (8) + b

    13 = 13 + b

    so b = 13-13 = 0

    equation y = 13/8x
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