They are all represented by straight lines.
No they do not.
Linear graphs make straight lines. Non-linear graphs make thins like parabolas, hyperbolas, and ellipses.
They are straight lines through the origin and their gradient is the constant of proportionality.
I looked up and I think you use them to draw graphs but can use them to draw straight lines.
They are all represented by straight lines.
No they do not.
No, they NEVER ever have strait lines. Some graphs may have straight lines but most do not.
Linear graphs make straight lines. Non-linear graphs make thins like parabolas, hyperbolas, and ellipses.
No.
They are straight lines through the origin and their gradient is the constant of proportionality.
I looked up and I think you use them to draw graphs but can use them to draw straight lines.
Linear graphs make straight lines. Non-linear graphs make thins like parabolas, hyperbolas, and ellipses
No, all polygons have straight lines. All lines are straight
Bar graphs and line graphs do not. Straight line, parabolic, and hyperbolic graphs are graphs of an equation.
Think about this: A straight angle makes 180 degrees, right? Straight lines, when measured by a compass, are also 180 degrees. So, yes, all straight angles are straight lines.
The link will show you several different kinds of graph. A straight line graph will literally be one straight line, representing a linear equation perhaps, or showing the closest straight line fit to a set of data. There are other line graphs that connect points on a grid with straight lines, even though the over-all graph may not be one single straight line. Graphs are very interesting and extremely useful. You can often find a straight line that is the 'best fit' for some data, but there may be other kinds of curved lines that are even better fits.