Here is the answer.
You gotta move to the right 3 times
(-2,7) and (14,21)
Find the slope by using the formula

Plug in the numbers.

Write it in point slope form first
y - y1 = m(x - x1)
y - 7 = 7/8(x - -2)
y - 7 = 7/8x + 1.75
+ 7 +7
y = 7/8x + 8.75
Our final equation would be: <span>
y = 7/8x + 8.75</span>
The answer is (6, -8). You add 8 to the x coordinate of vertex L and subtract 3 from its y coordinate.
You can do many operations, but the best operation to dk for a quick and easy answer is addition, but of course a common denominator would be needed.