Is the following relationship a function?

Josephine has a great garden with and area of 2x2 + x - 6 square feet

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 .

If rt is greater than ba, which statement must be true ?