Draw the graph of the line x+y=4.Use the graph paper to find the inclination and y-intercept

 Dear student,
Given line is x + y = 4 
From the given line x + y = 5,
we get,
x + y = 4 
y = -x + 4
y = (-1). x + 4...(A)
Again we know that equation of any straight line in the form
y = mx + c, where m is the gradient and c is the intercept.
Again we have if slope of a line is tan$\theta$ then inclination of the line is e Now from the equation (A),
we have m = -1
=> tan$\theta$ = 1
=> tan$\theta$ = tan 135°
=> $\theta$ = 135° And c = 4
Therefore the required inclination is $\theta$ = 135° and y-intercept is c = 4

Regards.