# Practical linear relationships

## Interactive practice questions

The points show the relationship between water temperatures and surface air temperatures.

a

Complete the table of values:

 Water Temperature (°C) Surface Air Temperature (°C) $-3$−3 $-2$−2 $-1$−1 $0$0 $1$1 $2$2 $3$3 $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$
b

Continue the pattern in the table to determine the surface air temperature when the water temperature is $4$4 °C.

c

What would be the surface air temperature when the water temperature is $14$14 °C?

Easy
Approx 4 minutes

Amy is gathering data on the growth of her plant. This is the data she has collected so far.

Justin is looking into the details of his mobile phone plan. He knows the costs for several call lengths.

### Outcomes

#### 9D.AG3.03

Describe the meaning of the slope and y-intercept for a linear relation arising from a realistic situation and describe a situation that could be modelled by a given linear equation

#### 9D.LR3.03

Determine other representations of a linear relation, given one representation