Pls help math test tmr

Answer:
y =15x
Step-by-step explanation:
Car A = 30m/s
Car B = x
Look at the graph carefully the slope created by both graph is different .Car A graph slope is alot more greater than Car B's. Car A speed is double the speed of Car B
So in order to find y it is
A= 2B
A/2= B
30X/2 = B
15X = B
B = 15X
y =15 x