Answer :
About 9 weeks. With Luis at 1000 and kya At 1008. Theirs no exact.
Graph into calc
Stat plot
Y1= 550+50x
Y2= 810+22x
X representing the weeks
Then press 2nd and graph.
Graph into calc
Stat plot
Y1= 550+50x
Y2= 810+22x
X representing the weeks
Then press 2nd and graph.