Define unit vectors along the x-axis and the y-axis as 

 respectively.
Then the vector from P to Q is

In component form, the vector PQ is (-8,5).
The magnitude of vector PQ is
√[(-8)² + 5²] = √(89) = 9.434
Answer:
The vector PQ is (-8, 5) and its magnitude is √89  (or 9.434).
 
        
        
        
Mode: 23
Range: 9
Median: 25.5
Mean: 25.5625
        
             
        
        
        
Answer:
0.5
Step-by-step explanation:
The given ordered pairs are: (1,2) (2,2.5) (3,3) (4,3.5) (5,4)
The corresponding sequence is :
2,2.5,3,3.5, 4,....
We can see that there is a common difference of d=0.5.
Better still we could use the slope formula:

We substitute the point (1,2) and (2,2.5).
The rate of change of this sequence is:

 
        
             
        
        
        
If Micael is 2 years older than sam and sam is 15 than than micael is 17