2. Which equation is the direct linear variation equation for the relationship? y varies directly with x and y = 10 when x = 2 A. y = x + 8 B. y = 5x C. y = x - 8

Question

Mathematics

Elias

6 July, 03:03

2. Which equation is the direct linear variation equation for the relationship? y varies directly with x and y = 10 when x = 2 A. y = x + 8 B. y = 5x C. y = x - 8

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Answers (1)

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Jaida Sandoval · Answer 1

Direct linear variation means y = kx where k is a constant

Inverse variation means y = k/x

For the first question y = kx

We are told y = 10 when x = 2

Therefore 10 = 2k k = 5

which is 5x not x-8