Answer:
a) 0
b) y = 2
Explanation:
Try working out the slope:
m = y2-y1/x2-x1
plug in the values
m = 2-2/-8-4
m = 0
The slope is 0, meaning that it is a horizontal line
we now know that for every x value, the y value will be 2 since it is a horizontal line, meaning the equation of the line is y=2.
We can also get y=2 from the equation y=mx+b
b is the y-intercept (2), since m(slope) is zero, the equation will be reduced to y = +b or y = 2