easy question

This keeps saying x&Y don't match - ??. Same data works fine on https://planetcalc.com/8735/
ref: https://planetcalc.com/5992/

x set: 1 2 3 4 5 6 7
y set: 2.142 1.372 1.222 1.123 1.100 1.074 1.027

Sorry if trivially simple issue ...

Bill
bill.mceachen@gmail.com