no but bar graphs do have to start at zero
Yes
Numbers to the right of zero on a number line are positive numbers; to the left are the negative numbers.
On a number line, the positive numbers extend to the right of zero, and the negative numbers extend to the left of zero. So -3.4 is 3.4 to the left of zero.
A number's distance from zero on a number line is its magnitude or "absolute value."absolute value or magnitude.absolute value
Absolute Value.
line graphs show a change over time
No.
A bar graph's data doesn't always start with zero but the scale on the y axis should. If you are not going to start the scale with zero then you have to put a squiggly line at the bottom to show that you skipped this space.
yes a graph has to start from a point 0.
No. And for examples where they don't look at graphs where the x-axis is years. If the scales do not start at zero, this fact should be clearly indicated.
Bar graphs and line graphs do not. Straight line, parabolic, and hyperbolic graphs are graphs of an equation.
Unless it is a direct proportion, the straight line does not have to start from zero.
Some common types of graphs used in science include line graphs to show trends over time, bar graphs to compare different categories, scatter plots to display relationships between variables, and pie charts to represent parts of a whole. Choosing the appropriate graph depends on the data being presented and the message that needs to be conveyed.
circle graphs add up to 100% , bar and line graphs don't
line graphs are usually the most best way to present data. sometimes i use pie graphs or bar graphs, but usually line graphs are the most meaningful.
Line graphs and Bar graphs
math