Please explain how the answer is 30 If y varies directly as x, and y is 180 when x is n and y is n when x is 5, what is the value of n? 18 30 36

Plzzzz i beg u asap ! what is the equation of this graphed line? enter your answer in slope-intercept form in the box.

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.