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To find the
-intercept, set
and solve for
. For
, this gives
, so the
-intercept is
.
To find the
-intercept, set
and solve for
. For
, this gives
, so the
-intercept is
.
These intercepts help in graphing the equation.
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Extra Insights
Did you know that intercepts are crucial for understanding the overall behavior of a linear equation? When you plot the x and y intercepts on a graph, they essentially give you anchor points that shape the line. This makes it super easy to sketch the full equation, as you only need two points to create a straight line!
Now let’s talk about some common mistakes: a frequent pitfall occurs when students forget to set the correct variable to zero! Always check that you set
to 0 to find the x-intercept and
to 0 for the y-intercept. Mixing these up can lead to erroneous points that throw off your entire graph!