In cryptography, inverse functions are used by government agencies and other businesses to encode and decode information. The alphabet is A = 1, B = 2, C = 3, ... If the encoding function is y=4x+7 and the code numbers are 15, 67, 55, and 87, what is the encoded word? (Find the y values of the inverse.)

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute:

answer: the slope is equal -1.