Question

Variable y varies directly with variable x, and y = 18 when x = 4.



What is the constant of variation in decimal form?

Answer 1

@igreen

Answer 2

As \(y\) varies directly with \(x\), so you have :
\[ y= kx\]

Answer 3

Now, you have \(y=18\) and \(x=4\), so just plug the values in and find \(k\) there..

Answer 4

ok so I do 4 . 18

Answer 5

\[18 = k \cdot 4 \implies 18 = 4 \times k\]

Divide by \(4\) both the sides to find \(k\) here..

Answer 6

You divide 4 to both sides..

18 / 4 = ? @Im_a_BANANA

Answer 7

4.5 @iGreen

Answer 8

Yes, you are right.. :) Good..

Answer 9

so 4.5 is the answer wow I feel stupid