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Here is a system of two linear equations with two unknown constants a and

b.

25 a y+ 6 x=2

16-a-x+6y=7.b

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a. Write down the matrix of coefficients and the

augmented matrix, and put both into echelon form.

Which statement is true about the rank of the two

matrices?

The rank of both matrices is always 2,/nb. Match the graphs to the cases:

No

solutions

1.

-2

Exactly one

solution

ע

-1

4

-2-

-4

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1

Fig: 1

Fig: 2