My classmate sent me this, apparently it's some sorta puzzle. Does anyone know the answer?

1 = 1
13 = 10
66 = 48
100 = ?

Can someone tell me if this is perpendicular? !

Which answer goes into the box? (90° clockwise rotation, 90° counter clockwise rotation, translation, or glide reflection)

Which equation shows y= 3 4 x− 5 2 in standard form? a 4x−3y=10 b 3x−4y=10 c 3x−4y=−10 d 4x−3y=−10