Answer:
The answer to your question is Ф = 45°
Step-by-step explanation:
Data
A (1, 4)
B (-1, 2)
Process
1.- Find the slope of the line
formula
m = [tex]\frac{y2 - y1}{x2 - x1}[/tex]
Substitution
m = [tex]\frac{2 - 4}{-1 - 1} = \frac{-2}{-2} = 1[/tex]
Slope definition, is the steepness of a line and also is the tangent of the angle of the line.
tangent Ф = slope
tangent Ф = 1
Ф = tangent⁻¹ 1
Ф = 45°
