Cant get wrong

the equation y = 4x + 4 describes the relationship between the quantities x and y. are the quantities in a proportional relationship?
a) yes, because the graph of the equation is a straight line.
b) no, because the graph of the equation is not a straight line.
c) yes, because the graph of the equation passes through the origin.
d) no, because the graph of the equation does not pass through the origin.

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels. ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0