Page 262 - Math Smart - 7

© Anita works in the same restaurant as Trevor. She has been there longer and earns $4 per hour,
a) Express Anita's wages (14/) in terms of the number of hours she works (h).
b) Complete the table below.
Anita's wages
Number of
24
1 2 3 4 5
hours of work
Wages ($) 4
21
Use the set of axes shown and draw a
graph to show Anita's wages. 18
d) Use your graph to work out how much
Anita will earn if she works
15
i) 6 hours.
ii) 4^ hours.
12
01
e) Use your graph to work out how many CTl
(5
hours Anita needs to work to earn:
i) $10.
ii) $21.

Joanne and Laura are jogging together. Laura
soon gets ahead of Joanne.
Laura jogs at 4 m per second (4 m/s) and
Joanne jogs at 3 m per second (3 m/s).
a) Write down the equation for the
distance (D) covered by Laura in terms 1 2 3 4 5 6 7 8
Hours (h)
of the time she took (t).
':-S
b) Complete the table below for Laura.
Time (s) 10 20 30 40 50
Distance (m)

Use the set of axes Distance that Joanne and Laura jog
shown and draw a graph
to show the distance 200
that Laura jogs on a
piece of graph paper.
d) Express the distance (D)
150
Joanne jogs in terms of
the time she took (t).

e) Make a table of values to
plot Joanne's graph. 100

f) On the same set of axes,
draw a graph to show the
distance that Joanne jogs.
g) Who covered more
distance in 50 seconds?

1 1 1 1 2r) 1 3b 40 50
Time (s)
UNIT 11 I Coordinate Geometry and Graphs