## Straight line equations

In the first tutorial I introduce you to the equation y = mx + c and the meaning of m and c.

How to find the Equation of a straight line y=mx+c - youtube Video

## Experiment with the Graph

Experiment with the graph below by changing the parameters to see how it affects the graph.

## Common questions using y=mx+c

Common questions on using y=mx+c : ExamSolutions Maths Revision - youtube Video

## Finding the equation of the line given the graph

Finding the equation of a line given the graph : ExamSolutions Maths Revision - youtube Video

You will often find that you need to find the equation of a line given a point on the line and the gradient.

#### Rule to remember:

- y – y
_{1}= m (x – x_{1})

Equation of a line (alternative form) : ExamSolutions Maths Revision - youtube Video

## Comparing y=mx+c to this new method

Equation of a line : Comparing methods : ExamSolutions Maths Revision - youtube Video

As part of my series on coordinate geometry I show you how to find the distance between two points.

Coordinate Geometry - Distance between two points : ExamSolutions - youtube Video

In this video I show you how to find the coordinates of the mid-point of a line segment.

Coordinate Geometry - Mid-point of a line segment : ExamSolutions - youtube Video

In this next example, I show you how to find the equation of a parallel line to a given line passing through a given point.

#### Example in the video

- Find the equation of a line parallel to the line 3y – 2x – 6 = 0 and passing through the point (-1, -2).