Use graphs to solve simple equations including simultaneous equations

Use graphs to solve simple equations including simultaneous equations

Lesson details

Key learning points

  1. In this lesson, we will investigate how to solve a pair of simultaneous equations by ploptting them and interpreting the coordinates at the point of intersection.

Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

Loading...

3 Questions

Q1.
Which table of values is correct for the equation x + y = 7?
A
B
Correct answer: C
Q2.
Which table of values is correct for the equation 2x + y = 7?
Correct answer: A
B
C
Q3.
Which diagram shows the correct graph for the line 3x + 2y = 15
A
Correct answer: B
C

3 Questions

Q1.
By using the graph, solve the equation 7=2x+2
x=-1
x=2
Correct answer: x=2.5
x=7
Q2.
By using the graph, solve the equation -3=5-2x
x=2.5
Correct answer: x=4
x=5
Q3.
By using the graph, solve the simultaneous equation y=5-2x and y=5x-2
x=0.4, y=-2
Correct answer: x=1, y=3
x=2.5, y=5

Lesson appears in

UnitMaths / Simple Graphs