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Mathematics 19 Online
OpenStudy (thefluffmuncher):

1. Find the constant of variation for the relationship f(x)= 50x. (Points : 1) x 5 f(x) 50

OpenStudy (thefluffmuncher):

is it 50?

OpenStudy (anonymous):

50.

OpenStudy (thefluffmuncher):

this is the equation right f(x)=kx

OpenStudy (thefluffmuncher):

@Loser66

OpenStudy (anonymous):

f(x) is called the function of x. ...xis the variable here, and 50 is the constant..

OpenStudy (thefluffmuncher):

oh ok

OpenStudy (thefluffmuncher):

mind helping me with some more questions?

OpenStudy (thefluffmuncher):

2. Find the constant of variation for the relationship shown in the following table: x 1 2 3 4 y 5 10 15 20 (Points : 1) 2 5 1 3

OpenStudy (thefluffmuncher):

i think it's 5

OpenStudy (loser66):

yup

OpenStudy (thefluffmuncher):

thanks have some more mind helping?

OpenStudy (thefluffmuncher):

3. If f(x) varies directly with x, and f(x) = 10 when x = 4, write the direct linear variation equation.

OpenStudy (thefluffmuncher):

literally don't know how to go about on this one

OpenStudy (loser66):

why not?

OpenStudy (thefluffmuncher):

don't really understand it

OpenStudy (loser66):

\(y =\color{red}{something}*x\rightarrow \color{red}{something}=\dfrac{y}{x}\) you have y =10, x =4 what stops you find the "something"?

OpenStudy (thefluffmuncher):

is it 2/5

OpenStudy (thefluffmuncher):

i mean 5/2

OpenStudy (anonymous):

or 5/2

OpenStudy (loser66):

yup

OpenStudy (thefluffmuncher):

4. If f(x) varies directly with x, and f(x) = 45 when x = 9, find the value of f(x) when x = 3. (Points : 1) 5 9 27 15

OpenStudy (thefluffmuncher):

do the same for this right

OpenStudy (loser66):

yup again

OpenStudy (thefluffmuncher):

i got 5=x

OpenStudy (thefluffmuncher):

but i'm not done am i?

OpenStudy (thefluffmuncher):

is 5 going to be k?

OpenStudy (thefluffmuncher):

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