Help!! It is about if it is a linear function or not I posted the options as well need it asap

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

Can you me find the missing length. i attached an image.