chem help
posted by ben .
im doing a graph for chem lab with excel.
my classmate created a graph with these coordinates:
X:
3.50 X10^3
3.14X10^3
3.28X10^3
Y:
11.7
8.96
9.75
They got R2=0.998 but i got y = 3074.9x
R² = 0.6291
why is it wrong. im desperate please help!
screen shot of my graph:
img530.imageshack.us/img530/7507/grph.jpg

I've graphed those values in Excel and then compared it to your image.
The graphs are the same, and my R2 value is closer to your friend's value.
Basically, your trendlines are different; the scatterplots are same.
You must have set the intercept to 0.0 along with checking off Display Equation and Display Rsquared value. If your professor has required that you have the trendline cross the yaxis, then your graph is correct (and your lab partner has just forgotten to Set Intercept for her trendline)
Respond to this Question
Similar Questions

Algebra
Could you please check my work. Determine whether the realtion is a funtion. 2.{(6,2),(2,5),(3,2),(3,7)} Not a function 2. Determine whether the equation defines y as a function of x. 2x+4y=15 the answer I got is y is a fucntion … 
Please check my Algebra
Determine the maximum possible number of turning points for the graph of the function. f(x) = 8x^3  3x^2 + 8x  22 I got 2 f(x) = x^7 + 3x^8 I got 7 g(x) =  x + 2 I got 0 How do I graph f(x) = 4x  x^3  x^5? 
algebra
I just need a quick check before I hand in my work if you would...Thanks. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and 6 for x I got these as my ordered pairs to graph (3, 1), (6, … 
chem
The study of kinetics group 1: Temp: 12.6 C T(K): 12.6+273= 285.6 1/T(K): 3.50X10^3 this one is the x value Time: 816 sec Rate ®: 7.66 x10^6 LnR: 11.8 this is the y value group 2: Temp: 45C T(K): 45+273= 318 1/T(K): 3.14X10^3 … 
chem  check my answers?
i already posted this but i tried to solve it on my own can you check at the end of this paragraph? 
chem lab
ok i have to plot a graph for my kinetics our teacher said in the end it'd the end the graph would give me numbers like this, y = 1.3x10^2x11.2 r^2 = 1 but when i plot it, i get weird numbers. am i supposed to plot exponents as i … 
chem
Can you please tell me if these are right? 
Please Help CHEM
Can you please tell me if these are right? 
chemistry
A 1.50 liter gas sample at 745mm HG and 25 celsius contains 3.55% radon by volume radon220 is an alpha emitter with a half life of 55.6 seconds. how many alpha particles are emitted in 5 minutes by this sample? 
Chem
I am doing a lab on enthaply of vaporization of water, I got everything else on the post lab but these two questions, please help. The deltaHvap data from the handbook reference vary with temp. 1) if your data were perfect, but deltaHvap …