Answer:
The pairs are;
t,         v
2,       96
4,       32
5,       0
6,      -32
7,      -64
9,     -128
Step-by-step explanation:
 The given equation is f(t) = -16·t² + 160·t
We have, the velocity, v = d(f(t))/dt = d(-16·t² + 160·t)/dt = -32·t + 160
Which gives;
t,                                 v  
0,    -32×(0) + 160 =   160
1,     -32×(1) + 160 =    128
2,    -32×(2) + 160 =    96
3,    -32×(3) + 160 =    64
4,    -32×(4) + 160 =     32
5,    -32×(5) + 160 =     0
6,    -32×(6) + 160 =   -32
7,    -32×(7) + 160 =    -64
8,    -32×(8) + 160 =    -96
9,    -32×(9) + 160 =   -128
The given velocity values are;
96, -64, 32, 0, -128, -32  which correspond to 2, 7, 4, 5, 9, 6
The pairs are;
t,         v
2,       96
4,       32
5,       0
6,      -32
7,      -64
9,     -128