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-   -   X and why intercept (https://www.askmehelpdesk.com/showthread.php?t=149076)

  • Nov 6, 2007, 07:13 AM
    dee77
    x and y intercept
    how would I find the x-intercept and y-intercept of 2x-3y=24?
  • Nov 6, 2007, 07:30 AM
    ebaines
    To find the y intercept, ask yourself this: if you set x = 0 into the equation 2x-3y=24, what is the corresponding value of y? And to find the x intercept, it's a similar process: set y=0, and determine x.
  • Nov 11, 2007, 09:40 AM
    nycfunction
    Quote:

    Originally Posted by dee77
    how would i find the x-intercept and y-intercept of 2x-3y=24?

    To find the x intercepts of an equation, let y = 0 and to find the y-intercepts, let x = 0.

    What is an intercept anyway?

    An intercept is a point in the form (x, y) on either the x- or y-axis through which a graph passes. In other words, it is a point through which a graph (picture of an equation or function) will travel through on the xy-plane.

    We have 2x - 3y = 24... By the way, this is called a linear equation.

    Let's find the x-intercepts, if any, first but of course, you could find the y-intercepts, if any, as your first step.

    To find the x-intercepts, we let y = 0 in the equation and then simplify.

    2x - 3(0) = 24

    2x - 0 = 24

    2x = 24

    x = 24/2

    x = 12

    Our x-intercept is the point (12, 0).

    Let's now find the y-intercept.

    We let x = 0 and simplify.

    2(0) - 3y = 24

    0 - 3y = 24

    -3y = 24

    y = 24/-3

    y = -8

    Our y-intercept is the point (0, -8)

    What does this mean? It means that when you graph your equation 2x - 3y = 24 on the xy-plane, the picture of the equation (called a graph), will go through the two points we found.

    Is this clear?

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