Answer:
B
Step-by-step explanation:
To evaluate the function, substitute x = -3. Since it is a negative exponent, it will create the reciprocal of the base.
[tex]y = 3 (\frac{1}{2})^x\\\\y = 3 (\frac{1}{2})^{-3}\\\\y = 3 (\frac{2}{1})^3\\y = 3 (2^3)\\y = 3(8)\\y=24[/tex]