Question

X and y are in direct proportion or are directly proportional.
When x = 5 and y = 8, what will be the value of:
a) y when x = 10
b) x when y = 40
c) What is the formula/ equation?

Answer 1

Answer:

a) x=16

b) y=5

these is the correct answer I think

Answer 2

Answer:

a. 16

b. 64

c.x1/y1 =x2/y2