Question

Please help!! Which values of a and b in the exponential function y=a*b^x would result in the following graph?

Answer 1

Answer: $a=-3, b=2$

Step-by-step explanation:

1. To solve this problem substitute the values of $a$ and $b$ into the function $y=a*b^{x}$ and prove for the value $x=0$.

2. When $x=0$, $b^{0}=1$ and $a*1=a$; this means that the graph of the function should cut in the axis $y=a$, if this does not happen, the values of $a$ and $b$ are not the right ones.

3. Then, we conclude that the correct option is the Option A:

$y=a*b^{x}$

$y=-3*2^{0}$

$y=-3$

4. You can see that the function cut the y-axis at -3.