Which of the following are involved in graphs of linear equations?
slope intercepts
the graph is a curve
the graph is the solution set.
the equation usually has a squared variable.

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad