Codes: AC9M10ST03. Goal: identify paired variables, units and a plausible association without claiming cause. Prepare: Table B and blank scatterplot frame.
- Launch · 2 min. Say: “These six routes are invented. If a route is longer, is its listed travel time usually longer?” Ask which two quantities form each pair.
- Model · 5 min. Plot
(2,7)and(4,13)with distance in km on the horizontal axis and duration in minutes vertically. Name the ordered-pair convention and units. Make the axes start at zero on this frame. - Guide · 6 min. Pairs plot
(6,18)and(8,26)then read back the coordinates. Ask why exchanging axes would change the question but not the source pairs. - Complete and interpret · 7 min. Students add
(10,31)and(12,35), then describe positive, roughly linear association in this invented set. A learner may describe the ordered pairs in text instead of drawing. - Check a leap · 3 min. Ask: “Can this plot guarantee a real 12 km trip takes 35 minutes?” No: the values are fictional and stops/traffic are unspecified. Discuss what the graph can and cannot support.
- Exit · 2 min. Everyone labels the variables and writes “as distance increases, listed duration generally increases” with the fictional scope. Sample focus explanations.
Access: raised or large-grid axes, coordinate list, partner operated marking or screen-reader table. The construct is association, not eyesight or pen control.