standard_description: Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method.
problem_activity: Task
The graph of a function of the form $f(x)=ab^x$ is shown below. Find the values of $a$ and $b$.
[IMG]


aligns: no