Which best describes the relationship between the lines with equations 5x +y = 4 and 20.0 + 4y = 16?

There is no relationship, except they do intersect at the point (1, -1). Hope this helps :)

Brainliest?

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value