Adozen apples costs $2.55 at this rate, how much would 8 apples cost?

$1.70

Step-by-step explanation:

A dozen apples is 12 and 8 apples is 2/3 of a dozen so if you do $2.55 which is the dozen apples by 1/3 that make $0.85 but we need 2/3 which is 8 which would make $1.70 since 0.85×2=$1.70

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

true? is that what you're asking or do you mean something else?