Déduire un taux de variation d'une courbe ou d'un tableau de valeurs

A coordinate plane. The x- and y-axes each scale by one. The graph is a group of line segments and curved lines that contains the following points: the point negative eight, negative three, the point negative five, zero, the point negative one, negative seven, the point zero, three, the point one, one, the point two, negative three, the point four, zero, and the point eight, six.