we are given the definition of sequence.
a sequence is a function whose domain is a set of natural numbers or a subset of natural numbers. we usually use the symbol to represent a sequence, where n is a natural number and is the value of the function on n.
x = number of texts
all star cell y=0.25x+11
top line y=0.15x+14
these show that the total cost is y, the additional monthly fee is 14 or 11, the cost of each text is 0.25 or 0.15, and the number of texts is x
the square root of 3 is the positive real number that, when multiplied by itself, gives the number 3. it is denoted by √3. the square root of 3 is an irrational number.