Question

A figure has a vertex at (-1,-3). if the figure has a line symmetry about x-axis , what are the coordinates of another vertex of the figure?

a. (3,1)
b. (-1,3)
c. (-3,-1)
d. (1,-3)

Answer 1

b. (-1,3)

Explanation:

the image of the point (x ; y) by symmetry about x-axis is : ( x ;- y)

so the answer "b" : (-1,3)