R version 2.11.1 (2010-05-31)
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[R.app GUI 1.34 (5589) x86_64-apple-darwin9.8.0]

[Workspace restored from /Users/matt/.RData]

> icecream = c(2,5,3,5,7,9,7,8,5,2,3,1)
> sharks = c(23,46,42,37,58,97,85,75,68,53,25,16)
> iceshark = lm(sharks ~ icecream)
> iceshark

Call:
lm(formula = sharks ~ icecream)

Coefficients:
(Intercept)     icecream  
     11.828        8.475  

> summary(iceshark)

Call:
lm(formula = sharks ~ icecream)

Residuals:
    Min      1Q  Median      3Q     Max 
-17.202  -9.215  -4.465  10.124  24.222 

Coefficients:
            Estimate Std. Error t value Pr(>|t|)    
(Intercept)   11.828      8.418   1.405 0.190290    
icecream       8.475      1.570   5.398 0.000302 ***
---
Signif. codes:  0 Ô***Õ 0.001 Ô**Õ 0.01 Ô*Õ 0.05 Ô.Õ 0.1 Ô Õ 1 

Residual standard error: 13.53 on 10 degrees of freedom
Multiple R-squared: 0.7445,	Adjusted R-squared: 0.7189 
F-statistic: 29.14 on 1 and 10 DF,  p-value: 0.0003023 

> plot(shark,icecream)
Error in plot(shark, icecream) : object 'shark' not found
> plot(sharks,icecream)
> plot(icecream,sharks)
> abline(iceshark)
> ?lm
starting httpd help server ... done
Tue Apr 24 09:49:01 mdhcp163.marlboro.edu R[47675] <Error>: kCGErrorIllegalArgument: CGSShapeWindow
Tue Apr 24 09:49:01 mdhcp163.marlboro.edu R[47675] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
>