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sotellme
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directly proportional? can anyone give an example of it?
thanks alot!
thanks alot!
cyby said:Careful. Make sure A is not a positive constant < 1. Otherwise you will get that they are inversely proportional.
cyby said:Careful. Make sure A is not a positive constant < 1. Otherwise you will get that they are inversely proportional.
"Directly proportional" means that two quantities increase or decrease at the same rate. In other words, as one quantity increases, the other quantity increases by a constant factor.
To determine if two quantities are directly proportional, you can plot them on a graph and see if they form a straight line passing through the origin. Alternatively, you can divide one quantity by the other and see if the ratio remains constant.
The formula for direct proportionality is y = kx, where y is the dependent variable, x is the independent variable, and k is the constant of proportionality.
Yes, a direct proportionality is always linear because the graph of two directly proportional quantities will always form a straight line passing through the origin.
Yes, a direct proportionality can exist if one quantity is negative. In this case, the graph will still form a straight line passing through the origin, but it will have a negative slope.