This is totally a math question..

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?