Question

y varies inversely with x, and k (the constant of variation) = 2. What is the value of y when x = 5?

Answer 1

do you know the equation for inverse variation ?

Answer 2

no

Answer 3

equation for inverse variation \[\huge\rm y = \frac{ k }{ x }\]
replace variables by their values then solve for y

Answer 4

so i have to divide

Answer 5

k divide by x yes

Answer 6

or you can keep it in fraction form
it's depends on answer

Answer 7

is it 1.4

Answer 8

nope....

Answer 9

oh sorry i divided the wrong problem lol

Answer 10

0.4

Answer 11

yes!

Answer 12

thanks!

Answer 13

can you please give me the formula for this problem
y varies inversely with x, and k (the constant of variation) = 5.6. What is the value of y when x = 4?

Answer 14

key word
*inverse* so which equation you suppose to use ??

Answer 15

the same one?

Answer 16

yes

Answer 17

thanks, i get confused sometimes with the formulas

Answer 18

i dont know when to dive or multiply

Answer 19

okay for inverse equation you should divide k by x
\[\huge\rm y = \frac{ k }{ x }\]
and for *DIRECT* variation
you should multiply k by x \[\huge\rm y = kx \]

Answer 20

sometimes they would give u x and y values
then it's your responsibility to find k

Answer 21

ohh thank you so much

Answer 22

my pleasure :-)
and \(\huge\color{Green}{{\rm welcome}\rm~to~open~study!!!!}\)\(\Huge \color{gold}{\star^{ \star^{\star:)}}}\Huge \color{green}{\star^{ \star^{\star:)}}}\)
\(\Huge \color{blue}{\star^{ \star^{\star:)}}}\Huge \color{red}{\star^{ \star^{\star:)}}}\)\(\rm\color{green}{o^\wedge\_^\wedge o}\)