JHS1 Mathematics · Term 2 Week 2: Number: Ratios and Proportion

Lesson notes

Indicator: B7.1.4.1.4 - Use the proportional reasoning to find missing values in the tables, and plot pairs of values on the coordinate plane.

By the end of the lesson, learners can:

Use proportional reasoning to identify the constant multiplier between rows in tables of equivalent ratios and find missing values.
Complete tables of equivalent ratios that include at least two missing values (such as x and y).
Write pairs of values from a completed ratio table as ordered pairs (x, y).
Plot pairs of values from a ratio table on a coordinate plane (using the first quadrant) and check that the points lie on a straight line through the origin.
Interpret a plotted point on a coordinate plane in the context of the ratio problem it represents.

Sign in with your phone number to read the full note and download the GES plan - free.

Strand: Number (Strand 1)
Sub-strand: Number: Ratios and Proportion (1.4)
Content standard: B7.1.4.1 - Demonstrate an understanding of the concept of ratios and its relationship to fractions and use it to solve problems that involve rates, ratios, and proportional reasoning
Indicator: B7.1.4.1.4 - Use the proportional reasoning to find missing values in the tables, and plot pairs of values on the coordinate plane.
Suggested placement: Term 2, Week 2 (Week 14 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. 26
Transcribed from the official NaCCA publication. Check this page against the source.

E.g. 2 Find the missing value marked x in a table of equivalent ratios.

3 10 6 x 9 30 y 40
x 10 10 60 = means the value of x = ×6= = 20
6 3 3 3