if x:=x(y) then y=0 => x=x(0)
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y must have a value of 0 at the x-intercept.
Well, darling, if x equals 0 in the equation, then y can be whatever the heck you want it to be! When x is 0, y is undefined, honey. So, go ahead and pick a number, any number, and call it y. Just don't expect it to make much sense in the grand scheme of things.
That is the value called the y intercept - value of y when x = 0 for example if y = 3x + 4 b = 4 and y = 4 when x = 0
Well, isn't that a happy little question! When y equals 0, it means that the point is right on the x-axis. So, the value of x at that point is also 0. Just like painting, math can be a beautiful and peaceful experience when we take our time to understand it.
Let x and y be two positive numbers. The cases are: x > y, then x - y > 0 x = y, then x - y = 0 x < y, then x - y < 0