# Math Assignment Help With The Y-Intercept

## 4.4 The y-intercept

y-intercept occurs where the input, or value of *x *is equal to zero.

For example:

y = *x*^{2} + 2*x* -15

*x*^{2} – 3*x* - 18

Now, putting *x* = 0 we get:

y = (0)2 + (0) – 15

(0)2 + (0) – 18

y = -15

-18

y = 5

6

y = 0.83

That is, the graph crosses the y-axis at y = 5/6 or 0.83.

Notice that when you express the polynomials of a rational function in standard form, then the y-intercept is simply the ratio of the final terms for the two polynomials.

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