Plz help me it’s multiple choice! i wanna do good on this.

Identify which functions are linear or non-linear. a. f(x) = x2 + 1 b. f(x) = 2x + 5 c. f(x) = x 2 + 3 d. f(x) = 3 x + 7 e. f(x) = 4x + 10 2 - 5

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

How much orange juice do you need to make 2 servings of lemony orange slush?