The angle between the positive horizontal axis and a given line is 135o. Find the equation of the line if it passes through the point (2,3)
- x - y = 1
- x + y = 1
-
x + y = 5
- x - y = 5
The correct answer is: C
Explanation
m = tan 135o = -tan 45o = -1\(\frac{y - y_1}{x - x_1}\) = m
\(\frac{y - 3}{x - 2}\) = -1
= y - 3 = -(x - 2)
= -x + 2
x + y = 5