Can some one help me ive been trying to figure this out i get stuck

Aline passes through 3,7 and 6,9 what equation represents the line

10x − 5y + 14 = 0 whats the answer pls

Julie begins counting backwards from 1000 by 2’s and at the same time tony begins counting forward from 100 by 3’s.   if they count at the same rate, what number will they say at the same time?