Which set of ordered pairs represents a function? {(-3,7), (7,-3), (-7,6), (-7, -1)}
{(7, -3), (-3,-9), (-3,-8), (8,1)}
{(8,-9), (4,-8), (-4,0), (-2,-8)}
{(-2,8), (-3,-3), (1, –4), (1,9)}

34 cup. a serving of vegetable soup is 23 cup. the restaurant sold 20 servings of chicken noodle soup and 18 servings of vegetable soup. how many more cups of chicken noodle soup did they sell than cups of vegetable soup?

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

The table above shows approximate conversions from gallons to liters. what is the value of x?