1. A sample of 10 households were monitored for one year. The household income (in $1000s) and the amount of energy consumed (in 10¹⁰ joules) were determined. The results recorded were as follows:

Income	31	40	28	48	195	96	70	100	145	78
Energy	16	40	30	46	165	92	96	77	115	67

Determine the correlation coefficient between income and energy consumption. What does the results from the correlation coefficient indicate about income and energy consumption in the city?