What is the next patter for 4.5,9,13.5,18

What is this inequality notation? t is less then or equal to 2

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

What is a graph with a never ending line called?