Question

Help in Algebra 1 question Screenshot below!

Answer 1

:))) Part B and C are my struggles

Answer 2

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.

Answer 3

@inowalst plz help!

Answer 4

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).

Answer 5

Omg thank you soo much :D

Answer 6

C would be which tho cuz its rate of change isn't that time and speed or something?

Answer 7

^^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.

Answer 8

would it be then (60,1) AND (60,5) ?

Answer 9

x comes first, so (1, 60) and (5, 60). Which means the domain would be [1, 5]

Answer 10

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

Answer 11

Ok and also another question regarding A you wrote (0, 3) wouldn't that be (0,30) because the 3 isn't shown?

Answer 12

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).

Answer 13

does that make sense?

Answer 14

ohhh :D

Answer 15

yes it does make sense when its not meaning a point :P

Answer 16

ok. for part C do you need help finding the rate of change?

Answer 17

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

Answer 18

let me ask you this, do you know how to find the slope given 2 points?

Answer 19

\[m=\frac{ y_2-y_1 }{ x_2-x_1 }\]
look familiar?

Answer 20

isn't the slope y=mx+b

Answer 21

10-5
m= _____ 5/3
6-3

Answer 22

y=mx+b
y= 5/3+b

Answer 23

right?

Answer 24

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

\[m=\frac{ 60-120 }{ 5-3 }=\frac{ -60 }{ 2 }=-30\]

Answer 25

so the rate of change is -30

Answer 26

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

Answer 27

you're welcome :)