The given graph shows the relationship between the cost of apples and the number of apples.
The cost of apples is represented on the y-axis
The number of apples is represented on the x-axis.
Let's determine whether to buy 20 apples, you need $7.
To decide if the statement is correct, trace the point from 7 on the y-axis and find the number of apples you can get at that point.