National 5 Applications of Mathematics

Graphs and Relationships Answer Sheet

Name: __________________________Date: ___________________________Class: __________________________

Use this sheet to check final answers. Pupils should still show working where needed.

1
Use the cafe customers line graph. What value is shown at 10:00?
Answer: 49 customers
2
On a cost graph, Plan A increases by £15.00 for each month and Plan B increases by £20.00 for each month. Which plan has the steeper graph?
Answer: Plan B
3
A line graph shows stock left after deliveries. How much did the stock fall from Monday to Wednesday?
Answer: 27
4
A distance-time graph is flat between 10:20 and 10:40. What does this show?
Answer: The person stopped moving
5
A scattergraph has one point far below the upward trend. What effect can this outlier have on the interpretation?
Answer: It may weaken the apparent positive correlation
6
A scattergraph compares weekly practice hours with a score. Describe the correlation.
Answer: Negative correlation
7
A hire cost graph rises from £0.00 to £20.00 over 2 hours. What does the gradient mean in context?
Answer: £10.00 per hour
8
On a cost graph, Plan A increases by £18.00 for each month and Plan B increases by £25.00 for each month. Which plan has the steeper graph?
Answer: Plan B
9
A line graph shows totals across the week. Between which two days is the largest increase?
Answer: Wed to Thu
10
A savings graph rises from £18.00 to £78.00 over 3 months. What does the gradient represent?
Answer: 20 pounds per month