#1**+1 **

y = 32 bounded above and below since this is a horizontal line

y = 2^{x} bounded below by the x axis.....unbounded above

y = 2 - x^{2} this is an inverted parabola with a vertex at (2,0)....thus...it is bounded above and unbounded below

y = √ [ 1 - x^{2} ] this is the upper part of a circle with a radius of 1.....thus....it is bounded below and above

y = x^{2} √ [ x + 4 ] ......this one is hard to see......look at the graph here :

https://www.desmos.com/calculator/oblelcc1ie

Notice that it is bounded below but not above

CPhill
Sep 26, 2017