Rates & proportional relationships

Big Deal appliance store is offering deep discounts on flat screen TVs. On the graph below, the $x$-axis represents the original price, and the $y$-axis represents the new sale price, in dollars. Big Deal's chief competitor, Appliance Hut, has announced that all sale prices $(S)$ on TVs will be determined according to the equation: $S=(0.60)P$, where $P$ is the original price. **Which store’s sale is better?** [[☃ radio 1]]