# Correlation Between Variables – The Relationship

A correlation is an indicator that a variable’s value is associated to another variable. A negative correlation indicates that the values of the two variables do not add up to a single value. A positive correlation indicates that the values of the two variables are positively correlated and will increase or decrease with each other.

A positive correlation implies that the values of one variable correlate with the values of another variable. A negative correlation indicates that the values of both variables do not correlate with each other.

For example, in a study that involved the use of a drug in the treatment of certain types of cancer, the positive correlation between the levels of certain proteins in patients’ blood showed that this drug was effective in fighting the disease. However, there were many other factors that were not known to the researchers. These other factors included whether the levels of these proteins were increased after chemotherapy or decreased when chemotherapy was used. Although these two variables could have been correlated, there is no direct relation between the two.

Another example of the positive correlation of interest is between the cost of living and inflation. Since the prices of many goods tend to increase in an environment where prices for other goods tend to increase, inflation can be expected to be an effect of the changes in price. Economists believe that if a good is more affordable to people at one point in time than it is now, then it tends to become cheaper over time, which is also true of inflation.

Correlation between variables or relationships can also be caused by changes in a variable. For example, if the price of food increases, then there will be a decrease in the number of people who eat healthy foods. As a result, a rise in the amount of unhealthy foods eaten is likely to be caused by changes in the supply of foods in the market.

The relationship between a variable and a cause (or effect) of another variable is called a correlation. A correlation can be a positive or a negative correlation. The latter occurs when the two variables are negatively correlated with each other and therefore they do not add up to a single value, while a positive correlation can occur when one of the variables is positive and the other is negative.

Positive correlations occur when there is an increasing relationship between the variables and a cause or effect of the other. On the other hand, negative correlations occur when the variables are decreasing and the other causes them to decrease. Correlations can also exist between two variables of different sizes and therefore a third variable could influence both of them.

When calculating a correlation between two variables, it is important to determine the value of each variable at a given time so that the value of the correlation will be the same throughout the relationship. For example, a correlation of two and a third factor are all negative. In such a case the correlation between the first two and the third is zero. However, if the first two are positive and the third is a negative correlation then the correlation between the third and the other factor would be zero.

Economic conditions and the state of the economy have a direct and significant impact on the amount of money that can be invested in a business. Therefore the greater the amount of money invested in a business the greater the potential for profits and the better off the business will be. Therefore the correlation between the amount of money that is invested in a business and the level of profit is known as the profit margin.

Profit margin is also affected by the type of investment that is made. If the money invested is used to buy a business and it is used to buy goods and services, then there will be more profits than losses if the investment is invested in goods and services that do not have a large enough potential for future returns. A small profit margin in the investment will allow the business owner to buy new goods and services when they have the most potential and to increase. If there is a large profit margin, then the owner will be able to continue to invest in newer goods and services that have a higher potential for future returns.

Correlation between two variables is also determined by the rate of growth of the first variable. If the first variable continues to grow then a high profit margin will continue to be seen, and if the first variable begins to decline then the profit margin will begin to decline.