What’s the answer to dis I need really bad

The graph shows the distance kerri drives on a trip. what is kerri's speed?

Answer! if you don’t mind, can you explain

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.)