Sparklestaraa
  • Sparklestaraa
Help in Algebra 1 question Screenshot below!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Sparklestaraa
  • Sparklestaraa
:))) Part B and C are my struggles
Sparklestaraa
  • Sparklestaraa
Does that have an affect on the overall answer for part A because I figured that I just didn't find it relevant to state.
Sparklestaraa
  • Sparklestaraa
@inowalst plz help!

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anonymous
  • anonymous
ok, it looks like your answer for A is mostly correct. Your domain for this function would be [0, 6] because those are the relevant x values. It looks like you used y-values for each part. The function is increasing on (0, 3) and decreasing on (3,6).
Sparklestaraa
  • Sparklestaraa
Omg thank you soo much :D
Sparklestaraa
  • Sparklestaraa
C would be which tho cuz its rate of change isn't that time and speed or something?
anonymous
  • anonymous
^^That was a correction for A. For b, it's asking for the domain (x-values) if the minimum of the function was $60. You want to look find the two points on the graph where y = 60, and use them to be the domain for B.
Sparklestaraa
  • Sparklestaraa
would it be then (60,1) AND (60,5) ?
anonymous
  • anonymous
x comes first, so (1, 60) and (5, 60). Which means the domain would be [1, 5]
anonymous
  • anonymous
For C, any function can have a rate of change. It just has different meanings for different applications. For this function rate of change is amount of profit gained or lost for each increases in price
Sparklestaraa
  • Sparklestaraa
Ok and also another question regarding A you wrote (0, 3) wouldn't that be (0,30) because the 3 isn't shown?
anonymous
  • anonymous
It's kind of hard to keep track of when you're starting out. Domains/ranges are represented by intervals, which uses the same notation as points. (0, 3) in part A is an interval, meaning the function is increasing from x = 0 to x = 3. It's not the point (0, 3).
anonymous
  • anonymous
does that make sense?
Sparklestaraa
  • Sparklestaraa
ohhh :D
Sparklestaraa
  • Sparklestaraa
yes it does make sense when its not meaning a point :P
anonymous
  • anonymous
ok. for part C do you need help finding the rate of change?
Sparklestaraa
  • Sparklestaraa
Yes i do cuz honestly I dont understand rate of change what so ever i figured its just the number but its a lot more confusing than it seems for me lol if that makes sense
anonymous
  • anonymous
let me ask you this, do you know how to find the slope given 2 points?
anonymous
  • anonymous
\[m=\frac{ y_2-y_1 }{ x_2-x_1 }\] look familiar?
Sparklestaraa
  • Sparklestaraa
isn't the slope y=mx+b
Sparklestaraa
  • Sparklestaraa
10-5 m= _____ 5/3 6-3
Sparklestaraa
  • Sparklestaraa
y=mx+b y= 5/3+b
Sparklestaraa
  • Sparklestaraa
right?
anonymous
  • anonymous
y= mx+b is the equation of a line. The slope is just m. Your problem has a parabola. But you can use the same formula to find rate of change. They want rate of change from 3 to 5. When x = 3, y = 120 When x = 5, y = 60 \[m=\frac{ 60-120 }{ 5-3 }=\frac{ -60 }{ 2 }=-30\]
anonymous
  • anonymous
so the rate of change is -30
Sparklestaraa
  • Sparklestaraa
ahhhhhh :D :D :D :D Ok That makes a lot more sense thank you so so so much for all your help and I will give u medals so check ur notifications thanks so much :D
anonymous
  • anonymous
you're welcome :)

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