Question

Write an appropriate direct variation equation if y = 8 when x = 2. *metals*

Answer 1

well the basic direct variation equation is

y = kx

k is the constant of variation

so substituting

\[8 = k \times 2\]

what do you think the value of k is?

Answer 2

y =16/x

y = 4x

y = 8x

y =4/x
(options)

Answer 3

I think it's y=4x

Answer 4

well done

Answer 5

are you using the same direct variation equation...?

Answer 6

I think so but it's graphing

Answer 7

well find the slope of the line....

and the slope will be the k value

Answer 8

I think it's direct

Answer 9

opps... misread the equation.... because its a straight line its a direct variation

the value of k... is the slope of the line

Answer 10

so it's inverse

Answer 11

no, its direct.....

y = 1/3 x

Answer 12

If y varies inversely as x, and y = 4 as x = 8, find y for the x-value of 2. (next work)