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dem82 [27]
3 years ago
15

Trichomes are hairlike outgrowths of the epidermis of plants that are thought to provide protection against being eaten by herbi

vores (herbivory). In a certain plant species, stem trichome density is genetically determined.
To investigate variation in stem trichome density within the plant species, a student counted the number of trichomes on the stems of six plants in each of three different populations. The student used the data to calculate the mean trichome density (numbers of hairs per square centimeter) for each population. The results are provided in the table below.
TRICHOME DENSITY IN THREE PLANT POPULATIONS (number of trichomes/cm²) Standard Error of Population Plant 1 Plant 2 Plant 3 Plant 4 Plant 5 Plant 6 Mean the Mean (SEM) I 1 II 1 6 9 15 8 12 13 10 9 14 9 11 8 13 12 6 17 8 9 16 14
(a) On the axes provided, create an appropriately labeled graph to illustrate the sample means of the three populations to within 95% confidence (i.e., sample mean + 2 SEM).
(b) Based on the sample means and standard errors of the means, identify the two populations that are most likely to have statistically significant differences in the mean stem trichome densities. Justify your response.
1. Independent variable
2. Dependent variable
3. Claim from the graph
4. Evidence from the graph (at least 3 bullets)
Mathematics
1 answer:
geniusboy [140]3 years ago
5 0

Answer:

E

Step-by-step explanation:

fire + gas = bigger fire

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Bad White [126]

Answer:

y = -\frac{2}{5} x-6

Step-by-step explanation:

1) First, find the slope of the line. Use the slope formula m =\frac{y_2-y_1}{x_2-x_1}. Pick two points on the line and substitute their x and y values into the formula, then solve. I used the points (-5,-4) and (0,-6):

m = \frac{(-6)-(-4)}{(0)-(-5)} \\m = \frac{-6+4}{0+5} \\m = \frac{-2}{5} \\  

So, the slope of the line is -\frac{2}{5}.

2) Next, use the point-slope formula y-y_1 = m (x-x_1) to write the equation of the line in point-slope form. (From there, we can convert it to slope-intercept form.) Substitute values for the m, x_1 and y_1 into the formula.

Since m represents the slope, substitute -\frac{2}{5}  in its place. Since x_1 and y_1 represent the x and y values of one point on the line, pick any point on the line (any one is fine, it will equal the same thing at the end) and substitute its x and y values in those places. (I chose (0,-6), as seen below.) Then, with the resulting equation, isolate y to put the equation in slope-intercept form:

y-(-6) = -\frac{2}{5} (x-(0))\\y + 6 = -\frac{2}{5} x\\y = -\frac{2}{5} x-6

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Makovka662 [10]

Answer:

Step-by-step explanation:

Y = 3x  + 16 - 27

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3 years ago
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The first answer is a and the second answer is d
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