Question

I fan and give medals!!! :)
xy = –25. What is the constant of variation for this relationship?
A.1/4
B.-0.4
C.-2.5
D.-25

Answer 1

HELP!!!

Answer 2

hmm can you solve that for "y"?

Answer 3

xy= -25 => ?

Answer 4

I have no idea how?

Answer 5

I just wanted to know is it A.?

Answer 6

is it 5 or -5

Answer 7

well... I gather you're meant to do the exercise

Answer 8

since 5 times 5 is 25 but its -25 soo....

Answer 9

\(\bf \begin{array}{llll}
\textit{something }&\textit{varies inversely to }&\textit{something else}\\ \quad \\
\textit{something }&=\cfrac{(\textit{some value })}{\textit{something else}}\\ \quad \\
y&=\cfrac{(n)}{x}
\end{array}\qquad n=\textit{constant of variation}\)

Answer 10

ok..... now what?

Answer 11

now just solve for "y", and the constant of variation will be visible :)

Answer 12

well how? can you walk me through it?

Answer 13

hmmm the exercise seems to assume you know already how to simplify linear equations

Answer 14

oh I'm sorry its D. because -25 is the constant right?

Answer 15

\(\bf xy=-25\implies y=\cfrac{-25}{x}\qquad n=-25\qquad \checkmark\)

Answer 16

ok thank you!!!

Answer 17

yw