x+y-9=0

Subtract x from both sides of the equation.

y-9=-x

Add 9 to both sides of the equation.

y=-x+9

y=-x+9

The slope-intercept form is y=mx+b, where m is the slope and b is the y-intercept.

y=mx+b

Find the values of m and b using the form y=mx+b.

m=-1

b=9

The slope of the line is the value of m, and the y-intercept is the value of b.

Slope: -1

y-intercept: 9

Slope: -1

y-intercept: 9

Choose 3 to substitute in for x to find the ordered pair.

Replace the variable x with 3 in the expression.

f(3)=-(3)+9

Simplify the result.

Multiply -1 by 3.

f(3)=-3+9

Add -3 and 9.

f(3)=6

The final answer is 6.

6

6

The y value at x=3 is 6.

y=6

y=6

Choose 2 to substitute in for x to find the ordered pair.

Replace the variable x with 2 in the expression.

f(2)=-(2)+9

Simplify the result.

Multiply -1 by 2.

f(2)=-2+9

Add -2 and 9.

f(2)=7

The final answer is 7.

7

7

The y value at x=2 is 7.

y=7

y=7

Create a table of the x and y values.

xy2736

xy2736

Graph the line using the slope and the y-intercept, or the points.

Slope: -1

y-intercept: 9

xy2736

Graph x+y-9=0