Question

The image of Rectangle PQRS reflected across the y-axis is Rectangle P'Q'R'S'. If the coordinates of the rectangle are P(-10,3), Q(-6,1), R(-2,6), S(-6,5), what will be the coordinates of P'? (-10,-3) (-3,-10) (3,10) (10,3)

Answer 1

Reflection across the y-axis means that every point in the figure transforms to

`(x,y)\rightarrow(-x,y)`

Therefore, the point P(-10,3 ) will be transformed into

`P(-10,3)\rightarrow P^(\prime)(10,3)\text{.}`

which is the fourth choice.