My real world function was about the different types of tacos and their prices. My partner for this project was Donald. My dependent variable was the price of the taco. My independent variable was the type of taco. The domain was the type of taco and the range was the price of the tacos. Our function worked when there was only one type of taco with one price. Our function becomes a relation when someone orders two of the same tacos which increases the price(output) but is still the same taco(input). We determined if the graphs were a function when we used the vertical line test. If more than one point passes through the vertical line test then the function is a relation.