Which situation represents a proportional relationship? The cost of purchasing grapefruit for $1.80 per pound with a coupon for $1.00 off the total
cost
O
The cost of purchasing peaches for $7.00 per box of peaches with a delivery charge of
$3.00
The cost of purchasing a basket of oranges for $1.30 per pound plus $5.00 for the basket
O The cost of purchasing apples for $1.75 per pound plus a shipping fee of $0.16 per pound

I think its A) The cost of purchasing grapefruit for $1.80 per pound with a coupon for $1.00 off the total cost because a proportional has to be based or the same .

Step-by-step explanation:

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1