Quick answer pls and step by step pls

mitch bought a stock for $40. the next day, he sold the stock for $42. what was the percent increase of the stock price?

Choose the point slope form of the equation below that represents the like that passes through the points (-6,4) and (2, 0)

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?

Which equation could represent the relationship shown in the scatter plot? y=−3x−2 y=−3/4x+10 y=−2/3x+1 y=9x−12 scatter plot with x axis labeled variable x and y axis labeled variable y. points go from upper left to lower right.