# Plotting Straight Lines from Two Points

Students learn how to plot the equation of a straight line using two points.

Later, as learning progresses they use straight lines to solve a pair of simultaneous equations.

##### 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.
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