Identify the reflection rule on a coordinate plane that verifies that triangle a(-1,7), b(6,5), c(-2,2) and a'(-1,-7), b'(6,-5), c'(-2,-2) triangle are congruent when reflected over the x-axis.
a) (x, y) → (-x, -y)
b) (x, y) → (x, -y)
c) (x, y) → (-x, y)
d) the triangles are not congruent

Option B is correct.

The reflection rule is followed here is,  .

Explanation:

Since, the triangle is reflected over the x-axis , then only y- coordinates will get changed but the x coordinates will remain the same.

Therefore, the only reflection rule on the coordinate plane that verifies the triangle are congruent when reflected over x-axis is,

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m