What is Slope-Intercept Form?
If you're unfamiliar with the term, make sure to check out the intro lesson to slope-intercept form first. There are a few different ways to write the equation of a line. One of the most common ways is called "slope-intercept" form. It's called this because it clearly identifies the slope and the y-intercept in the equation. The slope is the number written before the x. The y-intercept is the constant written at the end.
The y-intercept is where the graph crosses the y-axis.
Slope measures the steepness of a line. It's the ratio of the vertical change to horizontal change, or "rise over run."
We can also tell the direction of the line from the slope. If the slope is positive, the line will go up to the right. If the slope is negative, it will go down to the right. Horizontal lines have a slope of 0 and vertical lines have an undefined slope.
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