The list represents a function named k. Which of the choice also represents the function, k? (0,3), (2,3 1/2), (8,5), (-12, 0)

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?