Answer:
-1
Explanation:
The y-intercept can be found when x=0, so find f(x) when x=0. So the first step is to evaluate (2/3)^0, which is 1. According to the equation this is multiplied by -1, so the y-intercept is -1. You can also use a graphing calculator (or Desmos) so you can see a physical representation of it. Hope this helps! :)