Patterns and Relations

Curriculum details

Strand

Algebra (Strand 2)

Sub-strand

Patterns and Relations (2.1)

Content standard

B8.2.1.1 - Demonstrate the ability to draw table of values for a linear relation, graph the relation in a number plane, determine the gradient of the line and use it to write equation of a line of the form y = mx + c.

Indicator

B8.2.1.1.2 - Use graph of a linear relation to determine subsequent missing elements in the ordered pairs of the relation.

Suggested placement

Term 2, Week 5 (Week 17 of the year)

Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.

Curriculum reference

Mathematics, Common Core Programme (JHS1-JHS3), 2023, p. 115

Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g.1 Use information from a graph to find missing elements

The graph represents the relation y = 20x, where y is the cost (in Ghana cedis) of the weight (in kilograms) of meat sold in a market. Use the graph to find:
i. the cost of 3.5kg of meat
ii. the weight of meat that can be bought with GH₵80.
iii. Using the relation from the graph, how many kilograms of meat can be bought at a cost of GH₵240.
E.g.2 Use information from a graph to The diameter of a Wawa tree is currently 10 find missing elements: inches when it is measured at chest height. After 50 years, the diameter is expected to increase by an average growth rate of 2 inch

5
per year. The equation y = ( 2 ) x + 10 gives you 5
y, the diameter of the tree in inches, after x years.
i. Use the graph to complete the table below. X (years) 0 1 2 3 5
0 0 0 0
Y(diameter in inches)
ii. What will be the diameter of the tree in 100 years?