The line on the graph passes through points A(0,6) and B(3,0). A) Calculate the gradient of line AB. B) Find the gradient of a line perpendicular to AB. C) Find the equation of passing through point A and perpendicular to AB.

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 .