Agroup of students must collect at least $120 to organize a science fair. they have already collected $20. which graph best represents the possible amounts of money the students still need to collect?

When only separate discreet points are graphed it is called?

What is the average rate of change for this function for the interval from x=2 to x=4 ?

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?