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pochemuha
3 years ago
6

NEED HELP QUICK

Mathematics
1 answer:
Pani-rosa [81]3 years ago
4 0

According to an x/y table, when x = –3, y = 21; when x = 4, y = –28; and when x = 5, y = –35.

when x = –3, y = 21

If it is a direct variation then it satisfies y = kx

Lets plug in -3  for x  and 21  for y and find out k

y = kx

21= k (-3)

Divide by -3 on both sides

So k = -7

Lets check whether k = -7 for the other two set of values

when x = 4, y = –28,

-7 times 4 = -28

when x = 5, y = –35

-7 times 5 = -35

k =-7 satisfies all the set of values

So constant of variation k = -7

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