Y=mx+c question?

in a y=mx+c equation, is c the y intercept, because i have a maths book which says "remember c is not the y intercept, but just the value of


the y coordinateof the y intercept." I though they were the same???

Y=mx+c question?
Technically your book is correct but redundant. The y-intercept actually a point on the graph where the curve crosses the y axis. However, this point will always have an x-coordinate of zero if you think about it (0,c). So the book is technically correct but no one will disagree with you if you say that the y-intercept is just c.
Reply:ok the y intercept consists of the y value and the x value. it sounds like the book is saying that it is not saying that c means x is 0,. but just says what y should be at that point. it is just saying that the intercept for definition considers the x point whereas c should not consider x at all
Reply:i think its pretty much the same thing though the y intercept is usually b.
Reply:That's pretty much semantics, but technically the book is correct.





The y-intercept is a point, which must have two coordinates





(0, c)





That's pretty specific, so if you say "the y-intercept is c", then pretty much anyone with half a brain will know you mean (0, c).





That being said, I learned a very important thing in Algebra class: always, always, always submit your answer in the form the teacher wants.
Reply:the y-intercept of an equation is a point with two numbers, one for x and one for y. the c value would be the y value of the y intercept. but the x will always be 0 for a y-intercept.


ex. y=2x+5


the y-intercept would be at (0,5)





hope i helped!