Solve the system by graphing.

x+y= 9

x-y= -1

select the correct choice below and, if necessary, fill in the answer box within your choice.

a.
the solution set is { }
(type an ordered pair.)

b.
there are infinitely many solutions. the solution set is { (x, y) | ? }.
(type an equation.)

c.
there is no solution. the solution set is empty set.

graph the equation.

Option A. The solution set is (4,5)

Step-by-step explanation:

Solve the equation for y to obtain the form of the equation of the line.

You have:

y=-x+9 (The slope is -1 and the y-intercept is 9)

y=x+1 (The slope is 1 and the y-intercept is 1)

When you graph it you obtain the graph shown in the figure attached.

The solution is the intersection of the lines.

Then, the solution set is (4,5)

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step-by-step explanation:

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step-by-step explanation: