6=_2(x+1) solve or looking for a solution to this problem?

Pls will give brainliest and all p. s u can zoom in if u cant see plss

Which of the following represents the range of the graph of f(x) below

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .