Question

If y = kx, what is the value of k if y = 20 and x = 0.4?

A)5
B)8
C)9.6
D)50

Answer 1

Given expression :

• y = kx

let's plug the value of x as 0.4 and y as 20 in the given equation :

• 20 = 0.4k

• k = 20 ÷ 0.4

• k = 50

correct choice - D. 50

Answer 2

`\\ \sf\longmapsto y=kx`

`\\ \sf\longmapsto k=(y)/(x)`

• put values

`\\ \sf\longmapsto k=(20)/(0.4)`

`\\ \sf\longmapsto k=50`