9514 1404 393
Answer:
y = -1
Step-by-step explanation:
The slope formula tells you the slope is ...
m = (y2 -y1)/(x2 -x1)
m = (-1 -(-1))/(5 -3) = 0/2 = 0
We can find the y-intercept using the first point:
b = y -mx
b = -1 -0·3 = -1
Then the slope-intercept form is ...
y = mx + b
y = 0·x -1
y = -1 . . . . . simplified
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Of course, you can bypass all of that when you realize the two y-values are the same, so the line is a horizontal line with y equal to that value.
