y = x + 1
the equation of a line in slope-intercept form is
y = mx + c ( m is the slope and c the y-intercept )
to calculate the slope use the gradient formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (- 1, 0 ) and (x₂, y₂ ) = (0, 1 )
m = [tex]\frac{1-0}{0+1}[/tex] = 1
the y-intercept is (0, 1 ) ⇒ c = 1
y = x + 1 → is the equation of the line
