Pls help ASAP Explain why this mapping is or is not a function. A. This is a function because every input maps to only one output

B. This is a function because every output maps only the input

C. This is not a function because more than on input maps to an output

D. This is not a function because more than one output maps the input

Which rational number could be graphed between -4 and -5

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?