Checkpoint
One possibility is Another possibility is
There are, in fact, an infinite number of possibilities.
(Note that the integral formula actually yields a negative answer. This is due to the fact that is a decreasing function over the interval that is, the curve is traced from right to left.)
Section 1.1 Exercises
Section 1.2 Exercises
and so the curve is neither concave up nor concave down at Therefore the graph is linear and has a constant slope but no concavity.
Section 1.3 Exercises
Answers vary. One possibility is the spiral lines become closer together and the total number of spirals increases.