Jan

16

**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.

- 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.

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?

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.

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?

Steve,

I like the colours that you chose. By going in the red-yellow pattern it definitely separates each portion of the question into smaller chunks. I think the benefit of doing asides is that a student could print this out and do their work to the right of each portion of the question.

Abbi

Hi Steve, nicely done text boxes. You may want to look at increasing the contrast in the red boxes. You could do this by looking for a muted shade of red or using bold for the text.

I think these kinds of text box are handy to be able to produce to highlight key text.