Make m the subject of the formula 6m²=k

The solution set for 5v2 – 125 = 0 is

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 .

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)