Answer:
-2
Step-by-step explanation:
y=k/x
Replace y with 7 and x with -2
7=k/-2 gives you -14
Then you can replace k with -14 and x with 7
y=-14/7 gives you -2
7 children
$505-$115= $390
$390÷$65= 6
6+1= 7
.......................
x= 0, 1/2