CPM Homework Help : CALC Problem 9-100

For the following sets of parametric equations, express $y$ as a function of $x$ . Then compare the graphs of each parametric curve with its rectangular curve. Cite any similarities and any differences.

$x = \tan(t)$ and $y = \tan^2(t)$

$x = \log(t)$ and $y = 1 + t^2$
Hint (b):
$10^x = t$