Virtual Nerd: How Do You Write an Equation for Direct Variation Given a Point?

This problem may sound a bit confusing, but the teacher does a great job explaining what direct variation is. So watch this video and learn about k. It is a pretty direct explanation.

Watch this tutorial to discover how to take a table of values and describe the relation using a direct variation equation. [2:46]

y=kx. This is the direct variation equation. You have been given a table of values. So look at the table and figure out how to use this equation to write an equation that represents what is happening in the table. Does the equation...

In this tutorial, discover how to use the formula for direct variation to find the constant of variation and then solve for your answer. [2 :12]

Use the formula for direct variation to solve for y, after finding the value of k. When you use the formula and determine the value of k and x, you can plug in those values to determine the value of y. A quick tutorial that takes you...

Trying to write an equation in point-slope form? Got a point on the line and the slope? Plug those values correctly into the point-slope form of a line and you'll have your answer. Watch this tutorial to see how it's done. [1:47]

View this tutorial to see how to find the slope using the slope of the perpendicular line. Then, use this slope and the given point to write an equation for the line in slope-intercept form. [4:39]

This lesson shows how to write the equation for a parabola when given three points. [9:22]

How do you simplify expressions that have negative exponents? This video will walk you through the process and provide examples. [3:39]

Given the coordinates for a point on a line and given the slope of that line, write an equation in point-slope form. Really, all that needs to be done is to use the formula for point-slope form and plug in the values.