slope is m= -1-5/5+1
The y intercept or b is the other thing you need to know. (0,?)
y=mx+b
you could use the point slope
y-y1=m (x-x1)
Find the equation of the straight line that passes through the points (−1, 5) and (5, −1). Find the coordinates of the point where this line crosses the y-axis
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