Question

if y varies directly as x and y is 48 when x is 48 when x is 6 which expression can be used to find the values of y when x is 2

Answer 1

the expression is

y=8x

Explanation:

y varies directly as x is written as

`y \alpha x`

introducing constant

y=kx

from the question, when y=48, x=6

substitute it in the formula

48=6k

making k the subject by dividing through by 6

`(48)/(6) = (6k)/(6)`

k=8

putting the value of k in the expression,

y=8x

the value of y when x=2

y=8×2

y=16

thus the value of y when x=2 is 16.

Answer 2

EDGE 2020

Explanation:

A) y=48/6(2)

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