Ill give you the BRAINLIEST (if it lets me)

In what form is the following linear equation written y=9x+2

What is the base of 1/9 to the power of 2

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?