Math Help - Parameters- probably trivial

1. Parameters- probably trivial

Hi,
I'm awful confused on this, and can't find anything in my notes to help.

Find a parametrization of the form x=x(t) and y=y(t) for

$y^2=x-1 , y\geq 1$

I don't understand how or what I'm suppose to do, if someone could shine some light I'd be really grateful.

2. $x = t^2 + 1$

$y = t$

$t \geq 1$