hypothetical data on consumption expenditure ($) and income ($) is given in the table
x Y 80 55
100 65
85 70
110 80
120 79
115 84
130 98
140 95
125 90
90 75
105 74
160 110
150 113
165 125
145 108
180 115
225 140
200 120
240 145
185 130
test the presence of hetroscedascity using the golfeld quandt test.