Do all linear graphs have proportional relationship
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A linear relationship means that the slope of the line is proportional, which means that the line is straight. In contrast to the linear realtionship, the non-linear relationship's slope is not proportional and the line will curved and not straight. Formula of calculating the slope is the difference of y divided by the difference of x.
Linear graphs make straight lines. Non-linear graphs make thins like parabolas, hyperbolas, and ellipses.
If you are talking about linear graphs, m refers to the gradient (aka slope or rate of change).
Linear graphs make straight lines. Non-linear graphs make thins like parabolas, hyperbolas, and ellipses
Only if the two functions really represent the same function.