Question

What is x in the table below.

Green
2
3
5
6
10
Red
6
9
15
18
X

Answer
3.333
30
3
.333

Answer 1

(b) 30

Explanation:

Given a set of ordered pairs (green, red) = {(2, 6), (3, 9), (5, 15), (6, 18), (10, x)}, you want to know the value of x.

Proportion

The ratio of the red value to the green value is 6/2 = 3 in each case. To keep that ratio, we must have ...

x/10 = 3

x = 30 . . . . . . multiply by 10