correlation,negative correlation,positive correlation,negative,statistics,correlation and dependence,interpret correlation,linear correlation,curvilinear correlation,correlation and dependence (literature subject),degree of correlation,non linear correlation,pearson correlation,rank correlation,types of correlation,the correlation coefficient,interpreting correlation coefficients,pearson product-moment correlation coefficient,causation


Positive correlation: A positive correlation means that if one variable gets bigger, the other variable tends to get bigger. 

Negative correlation: A negative correlation means that if one variable gets bigger, the other variable tends to get smaller. The correlation between car weight and reliability is negative. This means that reliability tends to decrease as car weight increases. The correlation between car weight and maintenance cost is positive. This means that maintenance costs tend to increase as car weight increases.