Question

Please solve in R

The data below were collected in petri dishes, with each dish having the given concentration of Cadmium Chloride (X) in solution, and the growth of algae cells in the was dish recorded after two weeks’ time. Input the data into R, creating a data frame. Provide me the commands you used and print your data frame to the screen and print it out to show me what it looks like. Then construct a scatter plot of the data, with a title and well-labeled axes (include units of measurement somewhere on the plot). Then, add a smooth fitted quadratic curve given by the equation

126.760+(-4.47126)*x+(0.0369577)*x²

Please make sure that all points and the entire curve fit on the plot. and provide the commands you used to construct your final graph, as well the graph itself.

Y = Algae growth (cells x 10^4/ml)

X = Cadmium Chloride (microgm/l)

X Y

0 120.9

0 118.0

0 134.0

5 121.2

5 118.6

5 120.4

10 82.6

10 62.8

10 81.6

20 49.3

20 41.6

20 41.3

40 12.7

40 14.7

40   4.7

80   4.9

80   4.0

80   4.4

Answer 1

basically first i am providing the R commands which i am using and then R commands with output.

by applying command

plot(fit)

we get the following graphs

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