Question

y is directly proportional to x. If y = 10 when x = 2, find
A. the formula for y in terms of r
by when x = 6
B. x when y = 25

Answer 1

Answer:

y is directly proportional to x

so, y= r.x where r is constant

if y=10,x=2 then

10=r.2

=> r=10/2

=> r=5

A. y=r.x

when x=6 then

y=r.6

=> y=6r

B. y=r.x

=> x=y/r

=> x=25/5

=> x=5