A biologist measured the number of mosquito larvae on the surface of a 1 pond. The biologist randomly sampled various spots on the pond's surface. For each spot, he measured the surface area and counted the number of mosquito larvae in that spot. Surface Area (cm?) 4 20 25 40 40 45 45 Number of Mosquito Larvae 4. 5. 9. 11 a) Draw a mapping diagram to represent the relation between the surface area and the number of mosquito larvae. Identify the relation between the surface area and the number of mosquito larvae. Then tell whether the relation represented by the mapping diagram is a function. Explain. b) The biologist decides to find the average number of mosquito larvae for a given surface area. Complete the table. Then tell whether this relation is a function. Explain. c) Surface Area (cm²) 4. 6. 20 25 40 45 Average Number of Mosquito Larvae

find the point estimate for observation.

Bianca is a swimmer training for a competition. The number of 50-metre laps she swam each day for 30 days are as follows: 22, 21, 24, 19, 27, 28, 24, 25, 29, 28, 26, 31, 28, 27, 22, 39, 20, 10, 26, 24, 27, 28, 26, 28, 18, 32, 29, 25, 31, 27.Draw the stem and leaf plot by splitting the stems into five-unit intervals. Explain what the plot shows.

Suppose a researcher collects data on the air pollution levels, measured in milligrams per cubic meter, for both urban and rural areas in 35 states. The data is plotted with urban air pollution levels on the horizontal axis and rural air pollution levels on the vertical axis. Nevada is an outlier in the ?x‑direction. What must be true about this state? The urban air pollution levels for this state are much higher or lower than the rest of the states in the data set. The rural air pollution levels for this state are much higher or much lower than the rest of the states in the data set. This state is an influential observation. The rural air pollution levels for this state are much higher or lower than other states in the data set that have similar urban air pollution levels. The absolute value of the residual of this state is large.

Use a stem-and-leaf plot to display the data, which represent the numbers of hours 24 nurses work per week. Describe any patterns. 40 40 46 48 31 40 27 40 36 40 36 36 52 32 36 40 35 D 40 33 40 32 38 30 29 Determine the leaves in the stem-and-leaf plot below. Key: 313=33 Hours worked 3 4 51 (---))

For each type of chart determine the type of variable that should be used

a and b please

Please help

Please do not give solution in image format thanku