Question

Really simple problem, so can someone help me out! I appreciate it!

I had to measure the radii, circumferences, and areas of some circles. I put the data into a table and was asked to graph the radius (cm) to Circumference (cm). I did so and then it asked me to find the experimental equation. I know that the accepted is A=2pir, so what is the experimental? Thanks a lot!

Answer 1

or how do I find the experimental I should say.

Answer 2

@Hero @Abhisar @dakotahducharme @zepdrix @Luigi0210 @Compassionate @nincompoop @freckles @midhun.madhu1987 @adrynicoleb

Answer 3

Suppose on y you graph circumference and on x you graph radius
then we will get a straight line of equation
\[y=mx+c\]
Since this straight line passes through origin, c=0
we have
\[y=mx\]
\[2\pi.r=mr\]
Where m is the slope using this you can find the slop as 2pi, I'm not sure if this is what they are asking

Answer 4

They want an equation with another number that is similar, as I am also asked to find percent error.

Answer 5

after I find the experimental equation

Answer 6

Hm, I can't understand what they want, lol sorry :/

Answer 7

but is there a way to calculate something like pi that can replace it?

Answer 8

with the specific data I found

Answer 9

Well if you divide the circumference by the diameter, you will get pi

Answer 10

that's the definition of pi itself

Answer 11

oh, I think I get what I need to do

Answer 12

I do that to find pi and see how close it is

Answer 13

with percent error

Answer 14

yep

Answer 15

Awesome, thanks for the help!