Respuesta :

Equation would be: 25.15 - 1.75x
Where, x = number of days.

Substitute for x = 3, 
= 25.15 - 1.75(3)
= 25.15 - 5.25
= 19.90

In short, Your Answer would be $19.90

Hope this helps!
Your answer would be 19.9 per share after 3 days
if im correct