# Hotmath

# -Intercepts

The
**
-intercept
**
of a graph is the point where the graph crosses the
-axis. (Because a
function
must pass the
vertical line test
, a function can have at most one
-intercept
*
.
*
)

The -intercept is often referred to with just the -value. For example, we say that the -intercept of the line shown in the graph below is .

When the equation of a line is written in slope-intercept form ( ), the -intercept can be read immediately from the equation.

**
Example 1:
**

The graph of has its -intercept at .

Similarly, for a quadratic equation written in standard form , the -intercept is .

**
Example 2:
**

The graph of has its -intercept at .