Answer: 
Step-by-step explanation:
Given: The salary of Kelly is fixed but she earns a commission for each ice cream she sells.
Thus, Her earning will be a linear function dependent upon the number of bars she sold.
Since y represents the total earning of Kelly on selling x bars of ice- cream.
We can see at x=0, y=50
Thus her fixed salary=$50
Then,
, where m is the commission she gets for each ice cream.
Also at x=1, y=52.....> put thus in above equation
Then, 
hence, the equation best shows the relationship between x and y is :-
