Which of the following relations is NOT a function? A. [(3,1),(2, -1).(1,1)]
B. ((3,1).(-1,2),(1,1))
C. {(1,3).(2.-1).(1,1))
D. ((-1,3).(-2,-1).(1.-1)]​

C.

Step-by-step explanation:

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

(x, y)→(x − 8, y − 7)

step-by-step explanation:

enjoy!