Complete Question
The complete question is shown on the first uploaded image
Answer:
  The value is [tex]\vec B = 2, -3[/tex]
Explanation:
Looking at the graph in the diagram we see each unit is equal to 1 both in the x axis and in the y- axis
 Now the value of B along the x axis is Â
     [tex]B_x = 2[/tex]
and along the y axis the value  is Â
    [tex]B_y = -3[/tex]
Hence the vector B is
   [tex]\vec B =(B_x , B_y)= ( 2, -3)[/tex]