Model of real-life situations
It's given the statement: Ursula pays $1 for every 2 bananas she buys.
This means each banana costs $1/2 = $0.5
The table shown on the left side has some values of the number of bananas (x) and the cost (y) in dollars.
Note the very first line corresponds to the given condition: 2 bananas cost $1
Now for x=3 bananas, the cost is 0.5*3 = $1.50. This entry is also correct on the table.
For x=4 bananas, the cost is 0.5*4 = $2 as given in the table.
This means the table is a correct model for the statement.
If we set up an equation of y and x, it will be:
y = 0.5x
The graph and its corresponding function is
y = 2x which is incorrect because each banana costs $0.50 and NOT $2. This model predicts that for x=2 bananas, the cost would be y=2*2 = $4. This is not what the original statement means.
Thus, the correct model is the table on the left side.