Question

On a coordinate plane, an exponential function approaches y = 0 in quadrant 2 and increases into quadrant 1. It crosses the y-axis at (0, 3).
What is the value of a for the exponential function in the graph represented in the form of f(x) = a(bx)?

−4
−3
3
4

Answer 1

3

Because f(0) = a·b^0 = a, and the graph crosses the y-axis at (0, 3), so a = 3.