# Plotting Straight Lines from Two Points

#### What's Included

• Smart Notebooks Presentation
• Activ Inspire Flipchart
• Lesson Plan
• Microsoft PowerPoint Presentation
• Differentiated Worksheet

# Plotting Straight Lines from Two Points

Students begin to plot equations in the form ax + by + c = 0 substituting in x =0  along the y axis and y = 0 along the x axis .  The resultant line is joined between the two coordinates to represent the function.  As learning progresses students consider the gradient and intercept of the graph from its equation.
##### Differentiated Learning Objectives
• All students should be able to plot a straight-line graph in the form ax+by=c using two points on the axes.
• Most students should be able to plot a positive or negative graph in the form ax±by=c using two points on the axes.
• Some students should be able to plot graphs in the form of ±ax±by=±c where the variables are not integers.
##### Related Blogs
Extending transformations beyond shapes on a grid

Linear Graphs - Foundation

Linear Graphs - Higher

### Mr Mathematics Blog

#### Surface Area of Cylinders

When I teach how to find the surface area of cylinders I like to add a constant level of challenge and enjoyment to the lesson.  Rather than repetitively calculating the surface area of a cylinder I introduce more complex cylindrical shapes. How to find the Surface Area of Cylinders To find the surface area of […]

#### Teaching Mathematics for a Growth Mindset

Inspiring students to enjoy maths and feel the success that comes with attempting a difficult challenge is why I teach.  The feeling of success is addictive.  The more students experience it the more they want it and the further out of their comfort zone they are willing to go to get more of it.  Teaching […]

#### Equation of Straight Line Graphs

To find the equation of straight line graphs students need to calculate the gradient using two pairs of coordinates and the intercept which is the y value of where it crosses the vertical axis.  Examiner’s reports of past exam questions show students are more able to find the intercept of a straight line than they […]