Typically, joseph buys a single tire at a time for his truck. however, he sees an advertisement for a buy 3, get 1 free offer from a local tire shop and decides to take advantage of the deal. joseph's decision is mostly based on

Let's suppose that each tire costs X dollars.

then, if he buy 3, he would get 4 tires. it means that the value he gets is 4*X (because each tire cost X), and he is paying only 3*X (because he only pays for 3), which means that over time this is a better financial decision.

this shows a reflection over the x-axis and is translated one unit down and 6 units to the right (x + 6, y - 1)

hope this !

~just a girl in love with shawn mendes