Jaylene,
"Which is suggested by the passage?" and "Which is inferred in the passage?" are very close in meaning although they may be used in a test situation for slightly different purposes. Both of these prompts are stems leading to multiple choice answers; that is, the answer choices will be provided below the question.
If the question is either "Which is suggested by the passage?" or "Which is inferred by the passage?" they are both asking you to draw an inference. Inference is implies your ability to see the deeper meaning of the passage; that is, a meaning that may not be explicitly stated in the passage.
Sometimes "Which is suggested?" will be asking a different type of question. For example, "Which is suggested by the tone of voice used by the main character in this passage?" In this case they are not asking you think about inference overall in the passage but to interpret what the tone of voice of the character really is implying. So as you take a test be sure that you read the question carefully. If the word "suggested" is used be sure that they are not asking you interpret something more specific like the "tone" or "mood" of the passage. If the word "inference" is used it will generally always be asking you to interpret the "hidden" meaning or underlying meaning of the paragraph.
I hope this helps and good luck with your test taking. There are many resources online where you can practice reading paragraphs and answering questions like this. Instead of creating a specific example for you, I would urge you to search online with key words like "practice making inferences." I am sure you will find many online practice sites where you can practice this skill.
Regards,
Bill Newell
