Increasing the price of an item decreases the amount of people willing to buy it dependent

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?

Which graph represents the linear function below? y-3=1/2(x+2)