Question 43185
{{{y = 3^x - 1}}}
Think about this:
{{{y = 3^x}}}
Three to any power is always greater than zero: {{{y > 0}}}
Asymptote: {{{y = 0}}}
{{{ graph( 600, 600, -10, 10, -10, 10, 3^x, 0) }}}
Now, think about this:
{{{y = 3^x - 1}}}
Same concept, but every unit is one less: {{{y > -1}}}
Asymptote: {{{y = -1}}}
Range: {{{y > -1}}} (-1,+infinity)
{{{ graph( 600, 600, -10, 10, -10, 10, 3^x - 1, -1) }}}
It is (A).