what does the vertical line in an augmented matrix represent?
A )x-value
B )y-value
C )equals sign
D )line on a graph
C) equals sign
In an augmented matrix, the vertical line represents the division between the coefficients of the variables on the left side of a system of linear equations and the constants on the right side (which would follow the equals sign in the written equations). The augmented matrix is a compact way to write the system of equations without the variables and equals signs, making it easier to perform operations like Gaussian elimination to solve the system.