This task is from Tools for NC Teachers.  Students explore multiplicative tasks and word problems. This is remixable. 

Task preview

Part 1:

Sarah and Jose are both selling candy for a school fundraiser.  Sarah’s total amount of money is 7 times greater than the number of days that they have sold candy.  Jose’s total amount of money is $3 more than the number of days that they have sold candy.  Complete the tables below showing the amount of money that they have earned for all 7 days selling candy. 

Part 2:

For both Sarah and Jose, calculate how much money would be made after ten days of selling candy.  Write an equation with a symbol for the unknown number and solve.

 Part 3:

Write a sentence comparing Sarah and Jose’s amounts after ten days of selling candy.  Why does one amount increase at a faster rate?