Question

Given that y is directly proportional to x. If y = 30 and x= 5, write an equation that connects y with x.

Answer 1

Answer: y = 6x

Explanation:

Since this is a direct proportion, we will introduce the constant of proportionality here and this will be:

y = kx

Since y = 30 and x= 5,

30 = 5 × k

30 = 5k

k = 30/5

k = 6

Therefore, the equation that connects y to x will be:

y = kx

y = 6x

The equation that connects y to x is y = 6x.