Putting a Relation on a Grid

Turn a rule or a real situation into a line, and read one back.

8 questions, free, marked as you go with a worked explanation on every one.

What this covers

• data and graphs

The questions

1. Graph the relation y = 3x. Place the line on the grid.
2. A gym charges $10 to join plus $2 for each visit. Let x be visits and y the total cost. Graph it.
3. A tank holds 36 litres and drains 4 litres a minute. Let x be minutes and y the litres left. Graph it.
4. For the tank in the last question, after how many minutes is it empty?
5. Graph the relation with a slope of 5 that passes through (0, 5).
6. Two lines are graphed. One has a slope of 2 and the other a slope of 6. What is the difference on the grid?
7. For the relation y = 2x + 4, plot the point where x = 3.
8. A phone plan is $15 a month plus $0.10 a text. What is the total for a month with 120 texts?

Answer these free