Which description correctly applies to the concept of correlation

Strawberries cause two hours per pound kate buys 5 pounds he gets 20% off discount on the total cost how much does kate pay for the strawberries

At a cost of 200, your club bought 175 frisbees to sell at the pep rally. you plan on selling them for $5 each. what is the domain of the function?

What is the equation of the parabola with focus (-1,-1) and directrix y=1?