George buys some first class and second class stamps to put on some letters. Each first class stamp costs 67p, and each second class stamp costs 58p. The ratio of first to second class stamps is 1:4. George bought 320 stamps. How much did George pay for all the stamps?

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

step-by-step explanation:

step-by-step explanation:

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol