8.F.2: Compare properties of two functions each represented in a...

Compare properties of two functions each represented in a different way (algebraically, graphically, numerically in tables, or by verbal descriptions). For example, given a linear function represented by a table of values and a linear function represented by an algebraic expression, determine which function has the greater rate of change.



Sam wants to take his MP3 player and his video game player on a car trip. An hour before they plan to leave, he realized that he forgot to charge the batteries last night. At that point, he plugged in both devices so they can charge as long as possible before they leave.
Sam knows that his MP3 player has 40\(\%\) of its battery life left and that the battery charges by an additional 12 percentage points every 15 minutes.
His video game player is new, so Sam doesn't know how fast it is charging but he recorded the battery charge for the first 30 minutes after he plugged it in.

(a) If Sam's family leaves as planned, what percent of the battery will be charged for each of the two devices when they leave?
(b) How much time would Sam need to charge the battery 100\(\%\) on both devices?
Sam wants to take his MP3 player and his video game player on a car trip. An hour before they plan to leave, he realized that he forgot to charge the batteries last night. At that point, he plugged in both devices so they can charge as long as possible before they leave.
Sam knows that his MP3 player has 40\(\%\) of its battery life left and that the battery charges by an additional 12 percentage points every 15 minutes.
His video game player is new, so Sam doesn't know how fast it is charging but he recorded the battery charge for the first 30 minutes after he plugged it in.

(a) If Sam's family leaves as planned, what percent of the battery will be charged for each of the two devices when they leave?
(b) How much time would Sam need to charge the battery 100\(\%\) on both devices?


Is y = 2(x + 5) the same as the function described as "twice a quantity, plus 5"?
Is y = 2(x + 5) the same as the function described as "twice a quantity, plus 5"?
Compare two linear functions each represented in a different way



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