The line for which equation has negative slope?

Is each relation a function? if so, state whether it is one-to-one or many-to-one. 3. (-4,7), (-3,5), (1,4), (3,-8), (5,-11) 4. (-4,8), (-2,4), (0,1), (2,4), (4,8) 5. (-2, 1), (-2,3), (0,-3), (1,4), (3,1)

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?

How many zeros does this polynomial function, y=(x-8)(x+3)^2