The bottom left one is the only function there.
Answer:
It means the cost of one goby fish bag plus the cost of one shrimp bag. Times x. So x is the amount of bags
3(9) = 27
3(7) = 21
3(9+7) = 48
27+21 = 48
48=48
The equation of the circle would be
(
x
−
(
−
4
)
)
2
+
(
y
−
7
)
2
=
6
2
or
(
x
+
4
)
2
+
(
y
−
7
)
2
=
36
