Question

REFLECTIONS!!!! if P=(-2,7), find: Ry=1(P)!!!!!! SECOND TIME POSTING THIS PLEASE HELP!!!​

Answer 1

ANSWER

$R_{y=1}(P) = ( - 2, - 5)$

EXPLANATION

The given point is

P(-2,7)

We want find

$R_{y=1}(P)$

Thus, the image of P under a reflection in the line y=1.

The mapping for a reflection in the line y=k is;

$(x,y)\to (x,2k-y)$

This implies that,

$( - 2,7)\to ( - 2,2(1)-7)$

$( - 2,7)\to ( - 2,-5)$

Answer 2

Answer:

(-2,-5)

Step-by-step explanation:

Given that there is a point P with coordinates (-2,7) and it is reflected on a horizontal line y =1

To find the new coordinates of P

When a point is reflected over a horizontal line only vertical distance changes but horizontal distance i.e. from y axis or x coordinate remains the same

So new x coordinate = -2

P has distance of 6 from the line y =1

So P' will also have a distance of 6 on other side of y=1

i.e. y coordinates would be =1-6 =-5

So new coordinate is (-2,-5)