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Linear Equation

If y=kx, wh...

Question

If $y = k x$ , where $k$ is a constant, and $y = 24$ when $x = 6$ , what is the value of $y$ when $x = 5$ ?

A

6

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B

15

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C

20

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D

23

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Solution

The correct option is C $20$
Given, $y = k x$
Also given, $x = 6; y = 24$
$\Rightarrow 24 = 6 k$
$\Rightarrow k = 4$
Therefore, equation becomes
$\Rightarrow y = 4 x$
when $x = 5; y = 4 \times 5 = 20$
Option C is correct.

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