Simplify the expression.

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

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 .

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?