All direct variation graphs are linear and they all go through the origin.
Do all linear graphs have proportional relationship
Polynomials have graphs that look like graphs of their leading terms because all other changes to polynomial functions only cause transformations of the leading term's graph.
No.
All graphs show patterns. Bar charts are one way to show comparisons between groups.
All graphs are graphical graphs because if they were not graphical graphs they would not be graphs!
All direct variation graphs are linear and they all go through the origin.
Most graphs: Pie charts, bar graphs, histograms, scatter graphs can all be used.
Do all linear graphs have proportional relationship
they all compare different amounts
Polynomials have graphs that look like graphs of their leading terms because all other changes to polynomial functions only cause transformations of the leading term's graph.
No.
Whats all the graph
All graphs show patterns. Bar charts are one way to show comparisons between groups.
Bar graphs can compare two sets of data, as well as line graphs and circle graphs. To better improve my answer, double line graphs and double bar graphs compare two sets of data. Circle graphs cannot however, because they compare parts of a whole instead of, as a bar graph would, the amount of something. A circle graph is also incapable of showing data growth over a period of time, as line graphs do. All in all, circle graphs cannot compare to sets of data, and bar graphs and line graphs must be doubled to do so.
Line graphs may represent equations, if they are defined for all values of a variable.
All graphs need labels or data on both of the axis to be of use. So all graphs require a "key"