To represent the translation of a figure (in this case, a hexagon) 7 units to the left on a coordinate grid, we need to consider how the coordinates of the points of the shape will change.
A translation to the left involves subtracting from the x-coordinate of each point. This can be represented by a function where the output depends on the input variable \(x\) shifted to the left:
\[ f(x) = x - 7 \]
This function means that for each \(x\)-coordinate of the hexagon, you subtract 7 to get the new \(x\)-coordinate after the translation.
Thus, the correct function that Ella writes for the translation of the hexagon 7 units to the left is:
f(x) = x - 7