Answer:
y + 10 = 0
Step-by-step explanation:
Slope of horizontal line is zero (0)
m = 0
By point slope form of a line.

Answer:
9 units
Step-by-step explanation:
Given



Required
Determine the length of the longest segment
To do this, we use:

So, we have:



Take positive square root

<em>Hence, the length of the longest segment is 9 units</em>