write an expression to model the following situation: when rafa woke up, the temperature was –9°c. by noon, the temperature had
1 answer:
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Answer:
The vertex form of the equation is .
Step-by-step explanation:
You will use the equation to solve this parabola. (h, k) is the vertex. So, we plug this into the equation to get
.
Then, we substitute the point as our x and y to get (a lot of simplifying was done here). Then, add 2 to the right side of the equation and isolate the
to get
. Finally, divide by 9 on both sides to get
.
Now, substitute your back into the equation to get y =
.
This is in vertex form. If the answer is needed in standard form, simply distribute and simplify to get .
Answer:
a. There is more variability in the prices of kid socks because they have a greater range.
Step-by-step explanation:
A measure of variability is a summary statistic that represents the amount of dispersion in a dataset. Common examples are range, interquartile range (IQR), variance, and standard deviation.
From the histogram
Highest Number of Packs of Adult Socks = 7
Lowest Number of Packs of Adult Socks = 5
Range = 7 - 5 =2
Highest Number of Packs of Kid Socks = 7
Lowest Number of Packs of Kid Socks = 4
Range = 7-4 = 3
We conclude that there is more variability in the prices of kid socks because they have a greater range.
The correct option is A.
