The variables y and x have a proportional relationship, and y = 5 when x = 4. What is the value of x when y = 8? Enter your answer in the box. x = plzz help me

Question

asked Apr 21, 2019 64.3k views

2 Answers

Villi Magg · Answer 1 · 2019-04-27T02:49:05+0000

Answer

Find out the what is the value of x when y = 8 .

To prove

As given

The variables y and x have a proportional relationship.

$y \propto x$

y = kx

Where k is the constant of proportionality.

As y = 5 when x = 4

Put in the above

5 = 4k

k = (5)/(4)

Now find out the value of x , when y = 8

8 = (5* x)/(4)

x = (8* 4)/(5)

x= 6.5

Therefore when y = 8 than x = 6.4