Step-by-step explanation:
As we know, Scatter plots resembles line graphs in that they are plotted on the x and y axis and the purpose of a scatter plot is to shows if the variables are related to each other. If yes, they can draw a line of best fit which can expose or go through most of the points in the plot.
Given the information in the question, we know:
"they collected information of texting speed according to age"
=> We have 2 variables here which are age and (texting speed)
Step 1:
- Label the x-axis the input variable (age)
- Label the y-axis the output variable (texting speed)
Step 2: Plot the points according to age and texting speed
Hence, from that plot, it could have two cases in the relation of age and texting speed which are "the more time, more text is written", or "the less time, more text is written".
(a) When the sequence is arithmetic, sequential terms have a common difference.
... x - 3 = (4x/3) - x . . . . differences of sequential terms are equal
... (2/3)x = 3 . . . . . . . add 3-(1/3)x
... x = 9/2 . . . . . . . . . multiply by 3/2
(The arithmetic sequence is 3, 4.5, 6. The common difference is 3/2.)
(b) When the sequence is geometric, sequential terms have a common ratio.
... x/3 = (4x/3)/x . . . . . ratios of sequential terms are equal
... x^2 = 4x . . . . . multiply by 3x
... x = 4 . . . . . . . . divide by x. (the "solution" x=0 is extraneous)
(The geometric sequence is 3, 4, 16/3. The common ratio is 4/3.)
Answer:
17
Step-by-step explanation:
Use ratio method
98:2
850:x
so, x = (850 x 2) divided by 98 = 17.3469388
Round it to nearest whole number = 17
Answer:
cycle=33 students, driven=132 students, walk=55 students
Step-by-step explanation:
<h2>solution</h2><h2>60+15+x=100 to get the remaining percentage</h2><h2>x=25</h2><h2>15÷100×220=33</h2><h2>60÷100×220=132</h2><h2>25÷100×220=55</h2>
Answer:
Maridel wants to find out how many of her classmates plan to come to the next football game. There are 800 students in her school. She selects a sample of the population by putting the names of every student into a bag and drawing out 100 names.
Which statement(s) describe her sampling method? Check all that apply.
A) Her method will produce a biased sample.
<u>B) Her method will produce a valid sample.</u>
<u>C) Her method will produce a random sample.</u>
<u>D) Her method will produce a representative sample.</u>
E) Her method will produce an invalid sample.
Step-by-step explanation:
