NZ Level 6 (NZC) Level 1 (NCEA) Interpret Rate of Change

## Interactive practice questions

What can we say about the rate of change of the given line?

The rate of change is undefined

A

The rate of change is zero.

B

The rate of change is always negative.

C

The rate of change is always positive.

D

The rate of change is undefined

A

The rate of change is zero.

B

The rate of change is always negative.

C

The rate of change is always positive.

D
Easy
Less than a minute

A dam used to supply water to the neighbouring town had the following data recorded for its volume over a number of months.

Consider the proportional relationship shown in the graph, showing the number of fish caught over time.

Flooding from a big storm has covered a local road in water. James records the level of water on the road over time and constructs the following graph.

### Outcomes

#### NA6-7

Relate graphs, tables, and equations to linear, quadratic, and simple exponential relationships found in number and spatial patterns

#### NA6-8

Relate rate of change to the gradient of a graph

#### 91028

Investigate relationships between tables, equations and graphs