Anyone wanna play on my 3ds i got a lot of games

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

What is the difference between the equations of a vertical and a horizontal line?