For the given vectors
and 
The dot product of vectors a and b is defined as = 
So, 

= -16+12
= -4
first, the slope is needed, which is 3-2/3--3 which is 1/6 and so this will be y=(1/6)x+b which then we'll input (3,3) which is 3=2+b or b=1 so the equation is y=(1/6)x+1
Answer:
You probably should have gave them 2/3 of what they did. I wouldn't call you a scammer, but it was not fair.