What is the equation of the line that passes through the point (-6,3) and has a slope of -1/6

Solve for x i'll try to attach the files bc it's not letting me for some reason

Guests at an amusement park must be at least 54 inches tall to be able to ride the roller coaster. which graph represents the set of heights that satisfy this requirement?

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?