#### Answer

Fill the blanks with
$(-\infty,\infty) ... (0,\infty)$

#### Work Step by Step

The graph of $ y=b^{x}$ when $ b \gt 1$
- is above the x-axis,
- always rises,
- approaches $ y=0$ on the far left,
- rises to pass through ($0,1$) on the y axis,
- continues to rise rapidly, passing through ($1,b $), ($2,b^{2})$,...
Domain: all reals, $(-\infty,\infty)$
Range: $(0,\infty)$
Thus, we fill the blanks with:
$(-\infty,\infty) ... (0,\infty)$