Learn how to calculate the slope of the line in a graph by finding the change in y and the change in x. Created by Sal Khan and Monterey Institute for Technology and Education.

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Drawing a number line helps visualize 'x is less than 4'. We mark 4 with a circle, not a dot, because 4 isn't included. Then, we color the line below 4, showing all values less than 4. Easy …

Sal finds the y-intercept and the slope of a linear relationship representing someone accumulating cats! He then interprets what the y-intercept and the slope mean in that context. Created by …

Slope-intercept form (y=mx+b) of linear equations highlights the slope (m) and the y-intercept (b) of a line. Watch this video to learn more about it and see some examples.

We draw a solid line (not dashed) because we're dealing with an "or equal to" inequality. The solid line indicates that points on the line are solutions to the inequality.

So the regression line (line of best fit) doesn't have to pass through two of the points and sometimes doesn't even have to pass through one of the points. Remember that the goal of …

This structured practice takes you through three examples of finding the equation of the line tangent to a curve at a specific point.

Zachary, One way to say it is that: A linear function is an equation that's solution set of (x,y) pairs when graphed would create a line on the graph.

Let's learn how to calculate displacements from v-t graphs. We will see why the area under the v-t graph gives displacement.