Which function is Best represented by the graph of g

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

9/10 divide by -3/15 as a mixed number

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.