Let
x---------> the number of hits in January
y---------> the number of hits in February
we know that
 --------> equation 

 --------> equation 

Substitute equation 
 in equation 

 
 
Part a) About how many hits did the website have during Jan and Feb?
 ----> Round to nearest ten thousand-----> 

----> Round to nearest ten thousand-----> 

 
the answer part a) is 

Part b) Exactly how many hits did the website have during Jan and Feb?
 
the answer part b) is 
