(10 pts)
Consider the effect of average atmospheric temperature
on the pounds of steam used per month at a local 
manufacturing plant.

Temp, X  Pounds of Steam, Y
10.98 35.3 
11.13 29.7
12.51 30.8
 8.40 58.8
 9.27 61.4
 8.73 71.3
 6.36 74.4
 8.50 76.7
 7.82 70.7
 9.14 57.5
 8.24 46.4
12.19 28.9
11.88 28.1
 9.57 39.1
10.94 46.8
 9.58 48.5
10.09 59.3
 8.11 70.0
 6.83 70.0
 8.88 74.5
 7.68 72.1
 8.47 58.1
 8.86 44.6
10.36 33.4
11.08 28.6

Using the above data, fit the standard linear model.
Now, on a single figure, using B0 and B1 as the axes,
show
a) The point estimate (b0,b1)
b) The 90% joint confidence region for (B0,B1). 
c) The 95% confidence intervals for B0 and B1, separately,
and the rectangle these jointly indicate. 
d) Comment briefly on your results. What does the figure
tell you?