The function below shows the relationship between the length of each side of a cube (y) and the volume of the cube (x+3):

y equals cube root of x plus 3

Which graph best shows the function?

Question

The function below shows the relationship between the length of each side of a cube (y) and the volume of the cube (x+3):

y equals cube root of x plus 3

Which graph best shows the function?

anonymous · Answer

here are the answer choices.

welshfella · Answer

the graph will pass through the point (-3,0)  because 0 = cube root(-3+3)

anonymous · Answer

so would it be the first graph?

welshfella · Answer

you need to find the y intercept
- that is the value of y when x = 0
y =  cube root(0 + 3) = ?

welshfella · Answer

find the cube root of 3 - use ur calc

welshfella · Answer

cube root  3 =  ?

anonymous · Answer

1.73...

anonymous · Answer

@welshfella  sorry, i got sidetracked by family

welshfella · Answer

thats OK - but you have the square root there not the cube

enter 3 then ^ then 0.333333 and enter

anonymous · Answer

1.442249565...

anonymous · Answer

so would that be the y-intercept?

welshfella · Answer

yes  thats correct

welshfella · Answer

so which graph is it?

anonymous · Answer

its the second graph?

anonymous · Answer

because the second graphs intercept is a little more than 1, but the first ones is too much to be right, am i correct?

anonymous · Answer

im gonna go with the second graph because i think that right @welshfella thanks!:^)

welshfella · Answer

yes  thats right

yw