Which statement could be used to explain why f(x) = 2x – 3 has an inverse relation that is a function?

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 .

Which of the following is the shape of a cross section of the figure shown below

Can someone answer this question for me