The x-intercept tells the number of fish in the tank before any are sold.
Coordinates (20, 80) tell how many fish must be sold to have 80 fish remaining in the tank.
Step-by-step explanation:
You should know here that, the graph models a decreasing function. Also, the average rate of the change of the function, and which is the slope is -1 as it has a negative slope. And hence the correct option for this question are not these two. The correct options are the ones mentioned above. As the x-intercept tells the number of fish in the tank before any of them are sold. And the coordinates (20, 80) tells the number of fish that must be sold for having the 80 fish remaining in the tank.
