# How to find the y-intercept given y= (1/2)^x - 4?

May 5, 2015

The y-intercept is the value of $y$ at the point on the function where $x = 0$

$y = {\left(\frac{1}{2}\right)}^{x} - 4$ with $x = 0$

$y = 1 - 4 = - 3$

The y-intercept is at$\left(- 3\right)$

May 5, 2015

Set $x = 0$ in your function and remember that ${a}^{0} = 1$.