Key Idea: X-Intercept

The x-intercept is the point where a graph crosses the x-axis.
At this point, the y-value is 0.

General Rule:

• To find the x-intercept, set y=0 in the equation and solve for $x$.

• The result gives the x-coordinate of the intercept.

• Written as a point: (x,0).

Why this matters for the SAT:

X-intercepts are key in graphing, factoring, and quadratic problems.
They often represent solutions or zeros of an equation.