# If (-3, y) lies on the graph of y = (1/2)^x, then what is y?

Feb 18, 2016

Since we know the value of x, all we have to do is plug it into the function to find the value of y.

#### Explanation:

$y = {\left(\frac{1}{2}\right)}^{-} 3$

$y = {\left(\frac{1}{\frac{1}{2}}\right)}^{3}$

$y = {2}^{3}$

$y = 8$

Practice exercises:

1. An exponential function of the form $y = c \times {n}^{x - 4}$ passes through the points (4, 2) and (5, 6). Find the equation of the function.

2. Find the equation of the following . It is an exponential function.

Good luck!