Asked in Math and ArithmeticAlgebraGeometry
How do you find the x and y intercept?
April 25, 2012 4:36PM
It depends on whether you are doing the question graphically or algebraically.
Working from a graph:
The x-intercepts are the points where the graph cuts the x-axis. The y-coordinates of these points are 0.
The y-intercepts are the points where the graph cuts the y-axis. The x-coordinates of these points are 0. A function cannot do this since then it would be a one-to-many mapping which is NOT a function. However, some equations (eg a circle) may give rise to more than one y-intercepts.
Working from an equation:
Let y = 0 and find the values of x that satisfy the equation. These are the x-intercepts.
Let x = 0 and find the values of y that satisfy the equation. These are the y-intercepts.