The data below shows the price, y, in Kazakhstani tenge (KZT), that each bag of wheat flour can be purchased for at a wholesale market in Almaty if x bags are ordered. Number of Bags (x) 50 100 150...

I need help with all of it please

Extracted text: The data below shows the price, y, in Kazakhstani tenge (KZT), that each bag of wheat flour can be purchased for at a wholesale market in Almaty if x bags are ordered. Number of Bags (x) 50 100 150 200 Price in KZT (y) 6500 6000 5500 5000 (a) Find an expression for the price, y KZT, of each bag purchased in terms of the number of bags, x, ordered. (b) Hence find the exact total cost of purchasing 250 bags of wheat flour.