How to find the y-intercept given #y = x^2 + 2x - 3#? Algebra Graphs of Linear Equations and Functions Intercepts by Substitution 1 Answer Jim H May 3, 2015 The #y# intercept is a point on the #y#-axis. Where the #x#-coefficients are all #0#. Put in #0# for #x# and find #y#. #y= (0)^2+2(0)-3=3# The #y#-intercept is #-3# (or #(0,-3)# depending on your grader's preference). Answer link Related questions What is the x and y Intercepts? How many intercepts can a line have? How do you use substitution to find intercepts? How do you identify the intercepts on a linear graph? How do you use the x and y intercepts to graph a linear equation? How do you find the x and y intercept for #y=2x+3#? How do you find the x intercept for #y=2#? What is the y intercept for the #y=2# graph? What is the y intercept for #x=-1#? How do you find the intercepts of #x^2y-x^2+4y=0#? See all questions in Intercepts by Substitution Impact of this question 1958 views around the world You can reuse this answer Creative Commons License