Question

The values of x and y vary directly

and one pair of values are given.
Write an equation that relates x
and y.
x = 1, y = 0.5
y = [ ? ]x

Answer 1

its 1/0.5

Explanation:

x∝y

x=ky (k being the constant)

now x=1 when y=0.5

1=k(0.50)

k=1/0.5

k=0.5

so eq becomes

x=0.5y

y=(1/0.5)x