Answer: Yes it is a function.
This is because any x input leads to exactly one y output.
The graph passes the vertical line test. It is impossible to draw a single vertical line through more than one point on the parabolic curve.
Clare now has $64 in her bank account.
54 + 10 = 64
The answer would be 10.19m. If you want to round it of to a less precise
measurement it would be 10 m.