What does this mean can someone gelp me

When it says the reflection, that means, for example if its (6,2) it would (-6,-2). So that means your answer would be (-5,-3)

Reflection across the y axis
basically, the y axis is the mirror
therefor the x value would be multilied by -1
(x,y) mirrored over the y axis would be (-x,y)

so(3,5) mirrored over the y axis would be (-3,5)
go 3 left and 5 up and graph a point there