I need help with these fractions

Use the knowledge of x- and y- intercepts to choose the correct graph of the equation 3x+6y=6

What is r i 4.5+10r=-6.5 with work pls

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *