Learn how to calculate the equation of a line from a graph, work out the gradient from an equation, and visualise intercepts with this step-by step guide.

To write the equation of a line it is necessary to know the slope and the y intercept. There are three possibilities which depend on the data available.

8. Consider the parametric curve \ (x (t)=-2+2\cos t\text {,}\) \ (y (t)=1-2\sin t\text {.}\) State the Cartesian equation of the curve and the sketch the curve. Determine the direction of evolution ...

The top part of that image is the equation itself. The bottom part is a graph of the equation, which, as you can see, is exactly the same. To be fair, this equation cheats a little bit.

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

Working with the general equation of a straight line, 𝑦 = 𝑚𝑥 + 𝑐, use the interactive activity to see what a graph looks like when plotted. Select values for 𝑚, the gradient, and ...