The graph of y = abx is decreasing and passes through the point (0, 4). What values are possible for b?

Answer 1

Do you know if the question is asking about exponential functions? That is how I will answer the question.

Y = a*b^x is the formula for exponential functions. In order to find what values a and b are, you need to find the direction the graph is going, and the point given in the problem. Since the graph is decreasing, and the given point is (0, 4), the b-value has to be any value less than 1. The a-value would be 4. So, the equation would look something like this:

y = 4*(b<1)^x

Answer 2

If 0 < b <1, the equation will be correct. a = 4.