Solution:
Amount earned by Elise on each coupon card she sells = $ 4
As the graph is not given
But the, relationship between cards sold, x, and money earned, y is ,Direct relationship:As number of cards sold will increases , the amount of money earned increases.
So, the equation representing the relationship between cards sold, x, and money earned, y is → y(Money Earned)= 4 x(Cards Sold).
Option A :The situation represents direct variation.
The equation that represents the situation is : y= 4 x.
Graph is shown below.