The equation of a straight line is 3y + 9x -12 =0. Use the equation to find the (1) gradient of the line ​

Anyone know? is appreciated! will mark brainliest if correct!

During your cycling trip, you and your friends often stayed in hostels. the prices of these are listed below. hostel standard room (price per night) with breakfast (price per night) super sleep hostels £22.45 £28.65 normandy nights £18.55 £25 zzzola hostels £24.50 £30.99 belgian beds £11.20 £18.55 night-time rest days ? £33 what is the range in cost for a single night, including both standard room prices and with breakfast prices?

Hey free points ! people i have a few math questions on my profile consider looking at them i have to get done in 30 mins!