Question

You are designing a rectangular playground. On your scale drawing, the vertices of the rectangle are (10, –9), (10, –3), and (13, –9). What are the coodinates of the fourth vertex? A. )(13, –3) B.(13, –15) C.(7, –3) D.(–3, 13)

Answer 1

A rectangle with sides parallel to the axes, will have vertices:
(x1, y1); (x1, y2); (x2,y1); (x2, y2).
You have been given x1=10, y1=-9, y2=-3, x2=13. The only missing point is x2,y2 which will be (13, -3). This is choice A.