What is the best interpretation of $(x,y)=(1,70)$ in this context? … | Math SAT Question

The function

y = 0.25 x^{2} - 7.5 x + 77.25

models the estimated stock price, in dollars, of a company

x

days after the company went public.

What is the best interpretation of

(x, y) = (1, 70)

in this context?

y = 0.25 x^{2} - 7.5 x + 77.25

The company’s estimated stock price increased $1 every 70 days after the company went public.

1 day after the company went public, the company’s estimated stock price is $70.

70 days after the company went public, the company’s estimated stock price is $1.

The company’s estimated stock price was $77.25 when the company first went public.