GCSE Maths - How to Plot a Straight Line Using a Table of Coordinates #70

The video tutorial explains how to plot a straight line on a graph using a table of values. It provides examples with equations y = 2x + 3 and y + 1/2x = 4, demonstrating how to choose x values, calculate corresponding y values, and plot the points. The importance of using three points to ensure accuracy is also discussed.

What is the first step in plotting a straight line using a table of values?

• Choose random y values.

• Select random x values.

• Draw the graph first.

• Calculate the slope.

In the context of graphing, what does the term 'coordinates' refer to?

• The length of the line.

• The x and y values that define a point on the graph.

• The points where the line crosses the axes.

• The slope of the line.

When graphing y = 2x + 3, what y value corresponds to x = 0?

• 1

• 7

• 5

• 3

What is the coordinate point for x = -2 in the equation y = 2x + 3?

• (-2, -1)

• (-2, 1)

• (-2, 3)

• (-2, 5)

For the equation y + 1/2x = 4, what is the y value when x = 2?

• 5

• 4

• 3

• 2

What is the rearranged form of the equation y + 1/2x = 4?

• y = 1/2x + 4

• y = 4x - 1/2

• y = -1/2x + 4

• y = 4 - 1/2x

Why is it beneficial to find three points when drawing a straight line?

• To ensure the line is curved.

• To make the line longer.

• To use more graph paper.

• To verify the accuracy of the line.