Find a vector a with representation given by the directed line segment ab. a(−2, 4), b(3, 5)

For this case what you should know is that the vector ab will be given by:
 ab = b-a
 We have then:
 ab = (3, 5) - (- 2, 4)
 ab = ((3 - (- 2)), (5-4))
 ab = (5, 1)
 Equivalently the vector is:
 ab = 5i + 1j
 
 ab = 5i + 1j

Just turn the whole gym into pie

2.4+3.2t. you get the answer by adding the ones with variables and ones without