If y varies directly with x and y = 25 when x = 5, what is the value of k? how does this work when y = kx?
2 answers:
<h2>
Answer:</h2>
The value of k when x=5 and y=25 is:
k=5
<h2>
Step-by-step explanation:</h2>
Direct variation--
Two variables are said to be in direct variation if one variable could be written as a constant multiple of the other variable.
i.e. x and y are said to be in direct variation.
if there exist a constant k such that:

or if x is non-zero then we have:

Here we are given x=5 and y=25
This means that the value of k is:

If y = 25 and x = 5
25 = 5k
k = 5
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