Answer : y>0
f(x) = 9*2^x
f(x) is an exponential function
f(x) = 9*2^xf(x)=9∗2
x
When we plug in positive value for x , the value of y is positive
When we plug in negative value for x , the value y is also positive
So for any value of x, the y value is positive always.
Range is the set of y values for which the function is defined
y values are positive , so range is y >0
