It's a horizontal line, y = 8.
We start off with the equation 'y = mx + b'
Since we know that the slope is 0, we input that into m:
y = 0x + b
Input (7, 8) in order to find b:
8 = 0(7) + b
8 = 0 + b
8 = b
And so:
y = 0x + 8
Since the 0 makes x negligible, we can take it out:
y = 8
-T.B.
