Answers to Math 151 Exam 2 Review
1a) -1 b)
c)
d)
2 e) 
f) -1
g) 1/2
2a) The tangent line slope is -y/x, the slope of the radial line is x/y.
b) No. 
3. 
4. 
5a) L(x)= -x using t = -1, L(x) = x using t=1.
b) L(x) = -x for t=1, L(x) = 0 for t = -1.
c) 
6. sinx
8. 
9. 
10. 
ft/min
11. 
12. L(x) = 20x - 7
13. 1.975
14. 1.975
15. 
f has V.A. x=2 , H.A. y=1 , 
has H.A. y=2, V.A. x=1
16. 
17. 