The two red marks are where f(x) = g(x), neither of which lie on the axes.

The x-intercepts would be on the x-axis and the y-intercepts would be on the y-axis.

The other clue is that solutions are x values.

The x-intercepts would be on the x-axis and the y-intercepts would be on the y-axis.

The other clue is that solutions are x values.