Question

If y is directly proportional to x and y is 12 when x = 10, what is the function rule that describes the variation?

Answer 1

Answer: $y=1.2x$

Step-by-step explanation:

Given

Y is directly proportional to x

and y=12 for x=10

$\Rightarrow y\propto x\\\Rightarrow y=kx\\\text{Substitute x and y}$

$\Rightarrow 12=k(10)\\\Rightarrow k=1.2$

$\therefore \text{The function becomes}\\\Rightarrow y=1.2x$

Answer 2

what is your email I will email it to you