The slope intercept form is
.
Solution:
Given data: slope =
and y-intercept = –1
y-intercept means (x, y) = (0, –1)
Equation of a line for slope intercept form:

Here,
and
.
⇒

⇒

Do cross multiplication.
⇒

⇒

⇒

Divide both sides of the equation by 4.
⇒

⇒

Hence the slope intercept form is
.