Which relation is a function of x?

What is the slope of the line shown below?

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)

How many roots does the graphed polynomial function have? 1-02