Previous Reply:
No. That model has integrated graphics only. No space to put in a replacement card.
This is somewhat incorrect, you cannot replace a card that already doesn't exist in a laptop, but it is possible to add graphics via an external graphics card provided you have a thunderbolt port.
Updated Answer:
Yes, it is possible to install better graphics to a laptop. The previous answer-er was correct in saying you cannot install a graphics card in your model. But if you had a laptop with a thunderbolt connector, then you could buy a graphics card dock for about $200 USD.
In all, I don't believe you are able to, because you don't have a thunderbolt connector in your laptop model.