Question

The vertices of a triangle are P[4.1). Q(2.-8), and R(-8.1). What are the vertices of the image reflected across the y-axis?

Answer 1

Given:

The vertices of a triangle are P(4,1), Q(2,-8), and R(-8,1).

To find:

The vertices of the image reflected across the y-axis.

Solution:

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

If a figure is reflected across the y-axis, then

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

Using this rule, we get

$P(4,1)\to P_1(-4,1)$

$Q(2,-8)\to Q_1(-2,-8)$

$R(-8,1)\to R_1(8,1)$

So, the vertices of the image are $P_1(-4,1), Q_1(-2,-8), R_1(8,1)$.

Therefore, the correct option is B.

Note: Options are not in proper form.