I need help with this question

What is the y intercept of f(x)=(1/2)^x?

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]