Chapter 1 - Graphs - 1.2 Graphs of Equations in Two Variables; Intercepts; Symmetry - 1.2 Assess Your Understanding - Page 17: 36

a) The point symmetric with respect to the x-axis is $(-1,1)$ b) The point symmetric with respect to the y-axis is $(1,-1)$ c) The point symmetric with respect to the origin is $(1,1)$

The point on the graph is $(-1,-1)$ The symmetric points can be found on the graph by following the rules in the book: Symmetric with respect to the x-axis: if the point $(x,y)$ is on the graph then $(x,-y)$ is also on the graph. Symmetric with respect to the y-axis: if the point $(x,y)$ is on the graph then $(-x,y)$ is also on the graph. Symmetric with respect to the origin: if the point $(x,y)$ is on the graph then $(-x,-y)$ is also on the graph. Furthermore, the graph can be used as a proof of these statements. a) The point symmetric with respect to the $x$-axis is $(-1,1)$ b) The point symmetric with respect to the $y$-axis is $(1,-1)$ c) The point symmetric with respect to the origin is $(1,1)$