# SUBMARINE

Assignment: week 2 Activity 1

I have taken this math question out of our grade 9 math text in a chapter on Linear Relations and Equations.

1. A submarine starts at sea level and descends 50 m every 5 min.

a) Make a table of values of the submarine’s depth, using intervals

of 5 min, up to 30 min.

b) Graph the submarine’s depth using the table of values.

c) What patterns do you see in the table and the graph?

d) Suppose the submarine had started to descend from a depth of

219 m. What relation would model the submarine’s location

over time?

e) Write an equation to show how long the submarine would take

to go from sea level to a depth of 428 m.

f) Solve this equation using your graph.

g) How does the equation connect to the graph?

# SUBMARINE

### A submarine starts at sea level and descends 50 m every 5 min

A) TABLE OF VALUES
Make a table of values of the submarine’s depth, using intervals
of 5 min, up to 30 min.
B) GRAPH
Graph the submarine’s depth using the table of values.
C) PATTERN
What patterns do you see in the table and the graph?
D) RELATION
Suppose the submarine had started to descend from a depth of
219 m. What relation would model the submarine’s location
over time?
E) WRITE EQUATION
Write an equation to show how long the submarine would take
to go from sea level to a depth of 428 m.
F) SOLVE EQUATION
Solve this equation using your graph.
G) CONNECT
How does the equation connect to the graph?

1. aeaston says:
2. keith webster says: