Question

Find the equation of a line whose : y-intercept = −1 and inclination = 45°

Answer 1

Given, y-intercept = c = −1 and inclination = 45°.

Slope = m = tan 45° = 1

Substituting the values of c and m in the equation y = mx + c, we get,

y = x – 1, which is the required equation.