The y-intercept of a function f(x) is found by evaluating the function at x = 0. This uses functional notation (see Note) to express the following idea. The y-intercept is the value of the
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How to Find the Y Intercept of a Quadratic in Vertex Form As with standard form, simply plug 0 in as the value of x and solve. Here's an example. Let's say your function is y =