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# Part 1 – Vertical and horizontal lines

- Coordinate grids – one quadrant (0 to 10) – for Alpha Exercise:
- Coordinate grids – four quadrants (-10 to 10) – for Beta and Gamma Exercises:

**Teachers**: log in to access the following:

- Slides in PPTX (with click-to-reveal answers)
- Slides in PDF (one slide per page, suitable for importing into IWB software)

- Worksheet (with space for student work)
- Handout (slides with exercises only; 4 per page for reduced printing)

- Interactive Desmos graph showing horizontal and vertical lines (external site)

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# Part 2 – Lines of the form *y* = *mx* + *c*

- Coordinate grids – one quadrant (0 to 10) – for Alpha Exercise:
- Coordinate grids – four quadrants (-10 to 10) – for Beta and Gamma Exercises:

**Teachers**: log in to access the following:

- Slides in PPTX (with click-to-reveal answers)
- Slides in PDF (one slide per page, suitable for importing into IWB software)

- Worksheet (with space for student work)
- Handout (slides with exercises only; 4 per page for reduced printing)

- Interactive Desmos graph showing lines of the form
*y*=*mx*+*c*(external site)

**Teachers**: log in to access these.

What is the gradient of the line shown?

What is the equation of the line shown?

The equation of a line is given. Use this to help identify the distances between adjacent tick marks on each axis. Click the “New question” button to have another go.

# Part 3 – Lines of the form *ax* + *by* = *k*

- Coordinate grids – one quadrant (0 to 10) – for Alpha Exercise:
- Coordinate grids – four quadrants (-10 to 10) – for Beta and Gamma Exercises:

**Teachers**: log in to access the following:

- Slides in PPTX (with click-to-reveal answers)
- Slides in PDF (one slide per page, suitable for importing into IWB software)

**Teachers**: log in to access these.

**Teachers**: log in to view this content.

- A10a – Identifying and interpreting gradients and intercepts of linear functions graphically and algebraically – gradient and intercept should be your next topic, if you are not already familiar with them.
- A9b – Using
*y*=*mx*+*c*to identify parallel and perpendicular lines - A9c – Finding the equation of a line through two given points or through one point with a given gradient