Needing help thanks!

erica recorded the number of sales she made during each of the first 4 months when she began her new career erica plottedthe data on a coordinate grid and she noted that the data correlate to an exponential equation as shown (image attached)

What is the domain of the function shown in the graph?

Needing help thanks erica recorded the number of sales she made during each of the first 4 months when she began her new career erica plottedthe data on a coord class=