Answer:
The correct answer is b) x - y + 1 = 0
Step-by-step explanation:
In order to find this, start by finding the slope using the two points given.
m(slope) = (y2 - y1)/(x2 - x1)
m = (5 - 2)/(4 - 1)
m = 3/3
m = 1
Now that we have the slope, we can plug into point slope form along with either point. Then we can solve for 0 to see which equation is correct.
y - y1 = m(x - x1)
y - 2 = 1(x - 1)
y - 2 = x - 1
-x + y - 2 = -1
-x + y - 1 = 0
x - y + 1 = 0
