Expression 6: "x" squared plus left parenthesis, "y" plus 2 , right parenthesis squared equals left parenthesis, "r" plus 2 "a" , right parenthesis squared Has graph. To audio trace, press ALT+T.x2+y+22=r+2a2
6
Expression 7: "x" squared plus left parenthesis, "y" minus 2 , right parenthesis squared equals left parenthesis, "r" minus 2 "a" , right parenthesis squared Has graph. To audio trace, press ALT+T.x2+y−22=r−2a2
7
Expression 8: "x" squared plus left parenthesis, "y" plus 3 , right parenthesis squared equals left parenthesis, "r" plus 3 "a" , right parenthesis squared Has graph. To audio trace, press ALT+T.x2+y+32=r+3a2
8
Expression 9: "x" squared plus left parenthesis, "y" minus 3 , right parenthesis squared equals left parenthesis, "r" minus 3 "a" , right parenthesis squared Has graph. To audio trace, press ALT+T.x2+y−32=r−3a2
9
Expression 10: "y" equals "a" "x" Has graph. To audio trace, press ALT+T.y=ax