Idea 19of 21Builds onThe rule as 5x + 15
Graph the savings
How does a graph show when the savings are enough?
Today you'll discover
- what goes along the bottom and up the side
- why the dots make a straight line
- how to find the week on the graph
Think firstSuzie's table, ready to graph
On the graph, what goes along the bottom?
Decide first, then press Next. Read the bottom first, then the side.
A table of weeks and money beside a graph with weeks 0 to 8 along the bottom and dollars from $10 to $60 up the side. One dot for each week, joined in a straight line climbing to the right. A dashed line across at $52, the price, with the week 8 dot at $55 ringed. The last step shows Jimmy's graph from $55 up to $85.
See the whole ideathe big idea and the key word, in one place
The big idea
On a savings graph, time goes along the bottom and money goes up the side.
Pick a scale that fitsCount up the side by 5s or 10s, whatever lets the biggest amount fit on the grid. Suzie's side goes $10, $20 … up to $60.
Easy to get wrongStart the bottom at week 0, so the first dot shows the money saved before any chores.
Key word
- scale
- the amount each line on a graph's side or bottom counts by: 1s, 5s, 10s
Ready to use it?
- Graph a savings pattern from its table.
- Read a graph to find when the savings are enough.