Image: a coordinate plane ranging from 5 to –5 counting by 1s.] vertex c and vertex d are plotted on the graph. plot vertexes a and b to form a rectangle with an area of 36 square units. plot vertex e at (2, 4).

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 .