Homework Help

I've asked a few differnet people and they had no idea and I've been searching everywhere I'm pretty much lost, I hope this thread is ok. Anyway I have a chart that looks like

temperature in C Resistance Ohms
0 100
7 125.6
12 130
20 137
35 147.6
51 159.8
66 172.3

the question I have to answer is What is the average slope between 0 and 20 degrees celsius?

I did the y2-y1/x2-x1 but I don't think that's right, I got .54 that way and it just seems low.

anyway any help is appreciated

reply to post by sandman441


haha man i hate doing those graphs! if only i had my maths book
you need to find the gradient ect. ill try to remember that for you now

but firstly you should plot it ofcourse, i have never done "average slopes"

I don;'t think I have done average slopes either, I've done slopes in I think it was advanced algebra but we didn't really get into that I don't think. haha it would have been nice if the teacher went through this, He likes to put stuff on our homework that he didn't go over in class. Though I did take my last math class 2 years ago so I'm definately rusty.

Originally posted by sandman441
I've asked a few differnet people and they had no idea and I've been searching everywhere I'm pretty much lost, I hope this thread is ok. Anyway I have a chart that looks like

temperature in C Resistance Ohms
0 100
7 125.6
12 130
20 137
35 147.6
51 159.8
66 172.3

the question I have to answer is What is the average slope between 0 and 20 degrees celsius?

I did the y2-y1/x2-x1 but I don't think that's right, I got .54 that way and it just seems low.

anyway any help is appreciated

If (x0, y0) and (x0 + Dx, y0 + Dy) are two points on the curve, then the "average slope" of the curve between these two points is defined as the ratio of the change in y to the change in x,

From here-www.vias.org...

Change in y being 20

Change in x being 37

Depending what you are defining as x or y

delta y/ delta x

20/37 = 0.54054054054054054054054054054054

Seems like you did it right.

uh wow that's kind of a miracle, Thanks for the help.