Question

Assume the y varies inversely with x and y = 5 when x = 1.3. Write the indirect variation equation for the relationship. would I just multiply 5*1.3?

Answer 1

y=k/x

Answer 2

how do I know what k is or what am I doin?

Answer 3

k is just a constant, it could be any number but its just there in case (to be more mathematical). y=1/x shows the relationship too, for what information is given. you can just plug in y and x to y=1/x

Answer 4

because a fraction with a larger denominator is smaller, as x grows y gets smaller in y=1/x. This is what they mean by indirect variation.

Answer 5

y=k/x

y=k/1.3 ... plug in x = 1.3

5 = k/1.3 ... plug in y = 5

now solve for k

Answer 6

o okay just a sec. and ill tel you what I get

Answer 7

one of my chooses is 3.8 that's the only one that could work out of the chooses I got

Answer 8

5 = k/1.3

5*1.3 = k ... Multiply both sides by 1.3 to isolate k.

6.5 = k

k = 6.5

Answer 9

so the equation is y = 6.5/x

Answer 10

o sorry I did something totally different but I do understand what to do now thank you very much!

Answer 11

ok great, glad you know what to do now