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Key features of graphs — Harder example

Watch Sal work through a harder Key features of graphs problem.

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• what kind of refrigerator was that? Did that guy bought it on wish or what, after 2 hours and the dish is at 40 degrees Fahrenheit, what?, I am joking
• lol
i was thinking the same thing
• I do 5 lessons per day what about everyone else(giving SAT on August26, mine is DSAT)
• 1 unit for me per day, Attending on 26th August too (DSAT)... *Best of luck to you!!*
👍👍
• the question asks for rate of change of altitude, then why do we calculate rate of change of altitude over rate of change of time??
• because the answers is in altitude per second, so you have to know how many seconds passed.
• I get it how you got the answer, but why did you do altitude/time wouldn't that be y/x and in math you are suppose to do x/y so would it be 28/26 = 1.07692308, and then round to 1.08. So wouldn't the answer be the choice "B"?
• guys how are you all managing both English and math together? Do you guys take both subj daily?
• the question asks for rate of change of altitude, then why do we calculate rate of change of altitude over rate of change of time??
(1 vote)
• we do change in altitude over change in time, that gives the rate of change of altitude