I don't understand this very much ​

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

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 .

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?