GCSE Maths - Common Straight Line Equations You NEED TO KNOW #64

The video tutorial explains how to recognize and write equations for different types of lines on a graph. It covers vertical lines, which have equations in the form X = constant, horizontal lines with equations Y = constant, and diagonal lines where X and Y coordinates are equal, resulting in equations like Y = X. The tutorial also discusses diagonal lines with negative slopes, where Y is the negative of X.

What is the equation of a vertical line that crosses the X-axis at -2?

• Y = 2

• Y = -2

• X = -2

• X = 2

How do you determine the equation of a horizontal line on a graph?

• By calculating its slope

• By measuring its length

• By finding where it crosses the Y-axis

• By finding where it crosses the X-axis

What is the equation of a line that runs along the X-axis?

• Y = X

• X = Y

• Y = 0

• X = 0

If a diagonal line has points where the X and Y coordinates are equal, what is its equation?

• Y = -X

• Y = 0

• X = 0

• Y = X

For a diagonal line where the Y coordinate is the negative of the X coordinate, what is the equation?

• X = -Y

• Y = -X

• Y = X

• X = Y