Answer:
<h2>
23 cars</h2>
Step-by-step explanation:
total number of cars: x
the total number of axles: 46
and the number of axles installed per car: 2
2 axles in each car, then total instaled axles: 2•x
2•x = 46
x = 46÷2
x = 23
Yes it proportional because they all function of y=3x
0x3=0
2x3=6
4x3=12
6x3=18