I asked what Which answer choice best describes f(x)=x−12? The relationship shows a direct linear variation with a constant of variation of 12.

The relationship does not show a direct linear variation.

The relationship shows a direct linear variation with a constant of variation of 1.

The relationship shows a direct linear variation with a constant of variation of −12.

I was told that the answer was "the relationship shows a direct linear variation with a constant of variation of 1." But i chose that answer and it's wrong.

Someone answer this asap rn for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

Ineed no it anyone can see this

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.