Can the error of a converetd ammeter be a negative big value? and is the correction graph linear? Thank you

May someone explain how to do this question?

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Diego kicks a soccer ball from the end line. his fellow students time and mark the soccer ball as it moves down the field. the graph represents the ball's progress. based on the graph, during what time is the velocity constant and positive?