What is the difference between inversely and directly?

In direct variation, as one number increases, so does the other. This is also called direct proportion: they're the same thing. In inverse variation, it's exactly the opposite: as one number increases, the other decreases.

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Also, what does it means about direct proportional relationship and inversely relationship and how important it is in the circuit?

The current in a circuit is directly proportional to the electric potential difference impressed across its ends and inversely proportional to the total resistance offered by the external circuit. And the greater the resistance, the less the current. Accordingly, which graph shows an inverse relationship? Hyperbola graphs, like the one immediately below, show that the quantities on the graph are in inverse proportion. This graph states, therefore, that A is inversely proportional to B. (It also states that B is inversely proportional to A, but we are going to work with the statement 'A is inversely proportional to B'.)

Which of the following is most likely to be an inverse relationship?

Which of the following pairs is the most likely to exhibit an inverse relationship? Correct answer is 'D'. For an inverse relation, a change in one variable induces an opposite change in the other variable. Correspondingly, which of the following is an example of a negative relationship? A negative correlation is a relationship between two variables in which an increase in one variable is associated with a decrease in the other. An example of negative correlation would be height above sea level and temperature. As you climb the mountain (increase in height) it gets colder (decrease in temperature).

What attempts to determine the degree of relationship between variables?

Regression. Regression analysis is used to determine if a relationship exists between two variables.