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y-intercept

Discussion in 'Mathematics' started by teachingforages, Mar 11, 2013.

  1. Is the y-intercept a point, or simply a number?
     
  2. Is the y-intercept a point, or simply a number?
     
  3. Guish

    Guish New commenter

    It's represented by the coordinate (0, c) where c is the value on the y axis.. As it's the intersection with the y axis, the x's are always zero. To get the y intercept, replace all the x's in your equation by zero. For example, for y=mx+c, replace x by 0 and you'll get y=c. Hence, the point is (0,c). In the same manner, you can get the y intercept of any graph.

     
  4. PaulDG

    PaulDG Occasional commenter

    It's a point.
    It's the point where your line and the line x = 0 intersect.
     
  5. Thankyou for your replies.
    best wishes
     
  6. Would it be correct to say the intercept with the y-axis is at 5 if the point is (0, 5)? In other words, does the 'intercept with the y-axis' part take care of the x coordinate being zero?
     

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