Does the equation below represent a relation, a function, both a relation and a function, or neither a relation nor a function?

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

What is the slope of the line (-7,2) (4,6)