The graph given shows the cost of sandwiches at a sandwich shop.
In the graph, y represents the cost of sandwiches and x represents the number of sandwiches sold. Which equation describes the proportional relationship between the cost of sandwiches and the number of sandwiches sold?
A. y =5x
B. y = 10x
C. x = 10y
D. x = 5y
1 answer
A. y = 5x