Need with the top part and explain

Hope this helps!

Step-by-step explanation:

y=6x+4 is linear but not proportional because it doesn't have any exponents causing it to be Linear it is not proportional  because it is not in y=mx form

y=8x is linear and proportional because it is in y=mx form and doesn't have any exponents

y=x-3 is linear and not proportional because it is not in y=mx form it is not proportional it is linear because it has no exponents  

y=9x^2+1 is not linear and is not  proportionalit is not linear because it has an exponent and not proportional because it is not in y=mx form  

the dimensions are:

step-by-step explanation:

we want to find the dimensions of a rectangular box with volume of

we factor to obtain;

we rewrite the rightmost factor to obtain;

recall that:

we apply difference of two squares formula to obtain;

hence the dimensions are