This graph represents a linear function. Enter an equation in the form y = mx + b that represents the function described by the graph. It's one of these answers:
y=-4/5x
y=5/4 -1x
y= 4/5 -1x
y= -5/4x

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 .