Only 25 and 28 are functions.
A function must have only one y value per x value. For 26, the y value of 0 and multiple others have two different y values. For 27, all x values less than 0 have multiple y values.
A should be the right answer because 4*5/4=5 + 5*2=10 and 5+10=15.
easy
5% is .05 two decimals to the left
55 x .05 = 2.75
$2.75 is your sales tax
55+2.75=$57.75
Answer:
(-2,1),(-1,2),(-3,5/3)
Step-by-step explanation:
