Identifying k in tables

Identifying k in Tables
Introduction

In proportional relationships, the constant of proportionality, represented by the letter k, shows how two quantities are related. One effective way to find k is by examining ta...

A girl is helping sell homemade cookies at a school fundraiser for charity. One bag costs $5.50. Two bags cost $11.00. Three bags cost $16.50.

She notices that every time she sells one more bag, the total money increases by the same amount.

This looks like a proportional relationship, but to be sure, she checks whether the ratio of t...