What this lesson shows
A party costs $100 for the room and $4.50 for each student. A table: 10 students cost $145, 20 cost $190, 30 cost $235. Each 10 more students adds $45. A spreadsheet works out the same table from one formula.
The worked example
The lesson works this one step by step: party: $100 plus $4.50 each. Then your kid tries one like it on paper.
The steps
- Write the rule
- Each row: times, then add the start
- Find what each 10 more adds
- A spreadsheet copies one formula
- The points make a line
Helping at home
Your kid writes the rule, makes a table for 10, 20, and 30 students, and finds how much each 10 students adds. Ask: "What stays the same in every row? What grows?"
If your kid gets stuck
Each row: the cost for each student times the students, plus the start.
Watch it with Lux
With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.