Line Reader
Tap the step where the line rises the most. Then say by how many books it rose across that step.
The steepest rise is from Tuesday to Wednesday: the line goes from 15 to 30, a rise of 15. Every other step on this graph moves less than that, which is what makes this one the answer rather than merely a big move. Counting the gridlines between the two ends gives the same number as subtracting, and the lines here go up in 5s. The steepest step is the one that climbs the most lines, not the one that ends highest.
- Step 1. Find it. Tap the steepest step of the line.
- Step 2. Read it. Now read the scale and choose how many books that is.
What to say if they get stuck
- Find the bar, row or slice the question names before you read anything. Getting the label right matters as much as the reading.
- The scale does not always count up in single steps. Work out what a single line is worth before you read anything off it.
- Keep your finger level as you slide from the board across to the scale. Drifting up or down by a line is the commonest slip there is.