Exercise 1
Plot the following graphs (for x between 0 and 10):
a) y = 2x + 3
b) y = 3x - 4
Exercise 2
You can use the following formulae to approximatly convert between degree F and C.
F = 2C + 30
find the value of F if C = :
a) 10
b) 20
c) 100
d) 200
e) what about if F = 230, what would be the value of C?
Lesson
Title: Substitutions & Using Formulae
Learning Objectives
Level 3
To be able to explain how to use a formula expressed in words.
Can you explain how to convert m into cm?
Level 4
To be able to demonstrate how to substitute numbers into expressions.
What is the advantage of using an expression?
Level 5
To be able to demonstrate how to simplify algebraic expressions by collecting like terms.
Which terms can we combine and which can we not combine?
Resources
Level 3
Level 4
Introduce the idea of substituting values into equations
Substitution - Card Sort (iPad)
Level 5
Introduce the idea of grouping together like terms
Ten Ticks - 5, 5, 16-17 (Algebra additions)
Homework:
