The

formula for the equation of a line is:

y=mx+c

Where:

y= the y coordinates

m= the slope

x= the x coordinates; and

c= the y intercept of the line

hence we can find the slope of each line by rewriting it in this form. So:

1. Y=-2x+9

So slope is -2

2. 3x-y=9

-y=9-3x

Or

y=-9+3x

This can also be written as:

y=3x-9

So slope is 3

3. 5x-10y+13=0

So:

-10y=-13-5x

Dividing:

-y=-13/10-5/10x

Shifting the negative sign:

y=13/10+5/10x

This can also be written as:

y=5/10x+13/10

So the slope is 5/10

formula for the equation of a line is:

y=mx+c

Where:

y= the y coordinates

m= the slope

x= the x coordinates; and

c= the y intercept of the line

hence we can find the slope of each line by rewriting it in this form. So:

1. Y=-2x+9

So slope is -2

2. 3x-y=9

-y=9-3x

Or

y=-9+3x

This can also be written as:

y=3x-9

So slope is 3

3. 5x-10y+13=0

So:

-10y=-13-5x

Dividing:

-y=-13/10-5/10x

Shifting the negative sign:

y=13/10+5/10x

This can also be written as:

y=5/10x+13/10

So the slope is 5/10