Does the table represent an exponential?

x: 1,2,3,4
y: -1,-8,-27, -64

i don't think it does but i wanna make

Liesl grew 7/12 of a foot in one year. her little sister grew 1/3 of a foot during that same year. how much more did liesl grow than her little sister did

Multiply. write your answer in simplest form. 3/8 x 5/7

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box