What does a continuous domain mean, explain it like I'm 5 years old

Which of the following tables represents exponential functions?

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 .

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2 acellus answer