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What is the constant of variation, k, of the direct variation, y = kx, through (5, 8)?
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3 votes
What is the constant of variation, k, of the direct variation, y = kx, through (5, 8)?

User Andrii Mishchenko
by
8.1k points

2 Answers

4 votes

Answer:

k = 8/5

Explanation:

User Antonio Erdeljac
by
9.2k points
6 votes
(5,8) ⇒ x = 5 ; y = 8

y = kx
8 = k5
k = 8/5 ⇒ 1.60 in decimal and 1 3/5 in mixed fraction.

To check:
y = kx
y = 1.6(5)
y = 8

y = kx
8 = 1.6x
8/1.6 = x
x = 5
User Alex Karahanidi
by
7.9k points
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