How to write an equivalent expression for n times a using only addition

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

98 point question what is the record for most points in one

Abari owns 100 shares of stock a and 45 shares of stock b. for the past month, his stocks have been fluctuating inversely. stock a decreased by m cents per share and stock b increased by n cents per share. which equation can be used to find the total change in value of jabari's shares per month?