Is y=1/3x+3 a linear equation

What is a rational number between 9.5 and 9.7

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c