Since both variables are continuous, u can use the Pearson correlation coefficient. The higher the value, the more related are the two variables. Most probably; as one increases, the other increases as well (i.e. some positive r). So u need to see some high or medium-sized r (> 0.3) and it has to be significant (p-value < .05).
But be careful, a high IQ of the mother did not necessarily cause the high IQ in the Son. Nor the low IQ in the mother caused a low IQ in the Son. << NO Causal Relationship can be proved through your r >>
Causal relationships can be only examined through experimental designs, where the researcher can manipulate the X (independent variable) and notices the change in Y (dependent variable) after that.
It's not often that you find rectangular prism-shaped rocks with these dimensions. Rather, we assume that the rock would fit into a box with the given dimensions, but not actually fill every corner of the box. The maximum possible volume of this rock would be (1.9 cm)(1.5 cm)(3.8 cm) = 10.83 cm^3; the actual volume is most likely less.
Part A) W = 8x
Part B) S = 8(40) + 12y or S = 320 + 12y
Part C) $368 = 8(40) + 12y
$368 = $320 + 12y
-$320 -$320
$48 = 12y
(Divide 12 from both sides)
y = 4 hours
Hope this helps!
