Question

Find a possible exponential function in y = a · bx (y=a(b)^x) form that represents the situation described below.

Has an initial value of 2 and passes through the point (3, 128).

Answer 1

Answer:

y = 2 · 4ˣ

Step-by-step explanation:

Initial value of 2 means that a = 2.

y = 2 · bˣ

It passes through the point (3, 128), so:

128 = 2 · b³

64 = b³

b = 4

y = 2 · 4ˣ