**Key concepts:** Dynamically draw a triangle to calculate slope of a line segment. Introduce geometry link in an eActivity. Extend to length of the line segment formula.

**Apps: **eActivity, Geometry

Activity

Solution

YouTube video demo Particularly useful for first time users of Geometry app

# Category Archives: Linear functions and coordinate geometry

# Midpoint

**Key concepts:** Visualise the midpoint of a line segment and deduce a formula for its coordinates

**Apps: **Geometry

Activity

Solution

YouTube video demo Particularly useful for first time users of Geometry app

# Slope intercept form: equation of a line

**Key concepts:** Explore the effects of changing parameters in the equation of a straight line

using dynamic graphing. Use sliders and animate variation in the parameter, i.e. gradient and y-intercept.

**Apps: **Graph&Table

Activity

Solution

YouTube video demo

# Graphs of linear functions

**Key concepts:** Familiarity with Graph&Table app. The activity uses a problem context to develop the linear rule and then control the table of values displayed, the Graph window and introduce G-solve

**Apps: **Graph&Table

Activity

Solution

YouTube video demo