Is (1,9) (2,36) (3,81) a linear function? PLEASE HELP!ARE THEY LINEAR AND PLS TELL WHY?

What value is equivalent to 5 + [5 × (4 + 2)]? a) 35 b) 45 c) 60 d) 110

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Cal's go cart has a gas tank with the dimensions shown below. he uses a gas can that holds 11 gallon of gas, to fill the go cart tank. 11 gallon = 231 inches^3 how many full gas cans will it take to fill the go cart's gas tank?