I'm finna cry help a dum b b i tch out

Which shows the correct lengths of side c in both scales? scale 1: 45 m; scale 2: 60 m scale 1: 60 m; scale 2: 45 m scale 1: 36 m; scale 2: 27 m scale 1: 27 m; scale 2: 36 m mark this and return save and exit

Plzzz answer both questions and i will give you 100 points

What is the y-intercept of the line with the equation 3x + 4y = 12?