Question

3. Which of the following does NOT represent a

constant rate of change?
® (0,0), (9, 1), (18,2), (27, 3)
® (0,0), (2, 10), (5, 13), (11, 19)​

Answer 1

The second set.

Explanation:

Consider the first set of ordered pairs.

For an increase of 9 is the x-values the y values increases by 1.

In the case of the second set the increase in y values compared with increase in y values is different:

x = 2-0 = 2, y = 10- 0 = 10. That is 5 units of y for every unit of x.

x = 5-2 = 3, y = 13-10 = 3. That is 1 unit of y for every 1 unit of x.