This activity allows students to reason about ratio tables, which helps their understanding of what a ratio describes in a context and what quantities in equivalent ratios have in common. https://education.ti.com/en/activity/detail/double-number-lines
This lesson helps students explore the concept that every ratio has an associated unit rate. Unit rates are important in understanding slope as a rate of change and as a problem- solving strategy for finding solutions to problems involving proportional relationships. https://education.ti.com/en/activity/detail/introduction-to-rates
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