Question

The vertices of a triangle are P(4, 1), Q(2, –8), and R(-8, 1). Name the vertices of the image reflected across the y-axis.

a. P'(4, –1), Q'(2, 8), R' (-8, -1)
b. P'(-4, 1), Q'(-2, -8), R'(8, 1)
c. P'(–4, -1), Q'(–2, 8), R'(8, –1)
d. P'(4, 1), Q'(2, -8), R'(–8, 1)

Answer 1

@kevindragonlord

Answer 2

@RECKLESS43 @Thatonegirl_

Answer 3

I think if I remember from 2 years ago vertices are just like the opposite of the sign is in front of the number. Ex: (-2, 1) ---> (2, -1) tell me if I'm wrong because it's been 2 years since I've done vertices on a triangle.

Answer 4

Im confused @Directrix @CausticSyndicalist @SolomonZelman

Answer 5

do the same with the other points across the y axis

Answer 6

@jim_thompson5910 can you help me with this question?

Answer 7

do you understand what's going on in zpupster's pic?

Answer 8

Sorta

Answer 9

Reflecting (x,y) over the y axis turns the point into (-x,y)

so you just change the sign of the x coordinate

Answer 10

In zpupster's pic, (4,1) turns into (-4,1) or vice versa

Answer 11

So it would be either B or C

Answer 12

only the x coordinate changes

Answer 13

Oh, so it would be B, correct?

Answer 14

correct

Answer 15

Can you help me with a few more?

Answer 16

sure, 2 more