I believe it's increasing on all fronts, because if you start from the right, you see that the y values always increase, hence they are increasing. They do it for when x<0 and when x>0. So, it should be increasing on all real numbers
Answer is 12.73 Use Pythagorean theory Split square into two right triangles with diagonal line. To find the diagonal a^2 + b^2 = c^2 9^2 + 9^2 = c^2 162= c^2 Take square root of both sides 12.73 = c