If the line is horizontal, it is the greek letter theta, often used to label an angle.
If the line is diagonal, it is used to denote the diagonal of a circle. As the greek letter phi it is used to denote an empty set and also used to label an angle.
Izzy and Amie made the zero with a line through it!
How about "is always zero"?
A straight line passes through the x-axis one time, if its slope is non-zero, or not at all, if its slope is zero.
The slope is zero.
A line with slope of zero is horizontal. A line with no slope is vertical because slope is undefined on a vertical line.
Izzy and Amie made the zero with a line through it!
I and A!
How about "is always zero"?
sometimes zero
A straight line passes through the x-axis one time, if its slope is non-zero, or not at all, if its slope is zero.
The line going through an "o" helps to clarify the letter o, from the number zero.
Greenwich, England
The symbol is a zero with a diagonal line through it.
zero
y = 0. You can get this from the slope-intercept equation of the line.
This is the Zero line of longitude that passes through Greenwich Observatory in London, England.
The y-axis on a graph is the line that runs up and down through zero. The x-axis is the line that runs horizontally through zero. Both lines help people make their measurements in math.