The graph at the right shows four different direct variation equations plotted on the same coordinate grid. using what you know about direct variation, calculate the constant of proportionality (k-value) of each relationship and match it to a point on each line. choose from the k-values listed below. some may not be used.

k = -1
k = -9/2
k = 2/9
k = -1/5
k = 1/5
k = 3
k = -2
k = 1

point a __
point b __
point c __
point d __

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

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)) =

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)