The table shows Cassie's age and Heather's age over 3 consecutive years.
Cassie's age, x (years) Heather's age, y (years)
12 15
13 16
14 17
15 18
Which expresion can be used to represent Heather's age in terms of Cassie's age?
Since Heather's age is in every case 3 more than Cassie's age,
Heather's age = Cassie's age + 3
| | | |
y = x + 3
So it's y = x + 3.
Edwin