How do you find the slope and intercept of #x = -9#? Algebra Graphs of Linear Equations and Functions Slope-Intercept Form 1 Answer Jim G. Jan 23, 2016 Answer: slope is undefined and has no y-intercept. Explanation: x = - 9 is a special case of the equation of a straight line . This line is parallel to the y-axis and passes through points in the plane whose x-coordinates are - 9. Hence does not cross the y-axis . Related questions What is Slope-Intercept Form? How do you find the "m" and "b" of any linear equation? How do you determine the slope and y intercept when given a graph? Why is slope "rise over run"? How do you find the slope and y intercept of #2x+5=y#? What is the slope and y intercept of #y=x#? What is the slope and y intercept of #y=3.75#? How do you write #7+\frac{3}{5} x=y# in slope intercept form? How do you write #-5x+12=20# in slope intercept form? How do you write an equation in standard form for a line that goes through (5, –2) and (–5, 4)? See all questions in Slope-Intercept Form Impact of this question 254 views around the world You can reuse this answer Creative Commons License