Please help me I don’t understand this

Given the graph below state whether or not the relation is a function, and give the domain and range.

Convert 2000 swiss francs to dutch guilders

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2