Evaluate expression an the property used of (8-8)+21

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=

Select the two pairs of figures that are similar.