The equation y=12.21x +37.42 fits the scatterplot of the values for stock abc over the past month with an r-value of 0.9871. how much do you think abc will be worth at x=62 days?

I'm pretty sure you already solved this by now, but I'll say the answer anyway. This problem has already been solved by another as a verified answer. 

This is the concept of financial algebra, we are required to calculate the value of stock ABC which follows the model given by: 
y=12.21x+37.42
given that x=62 days, 
the value of th estock after 62 days will be given by: 
y=12.21(62)+37.42
y=757.02+37.42
y=794.44

ABC will be worth $794.44

I take no credit for this answer. It was solved by CastleRook. 

Ibelieve it would be letter c (: