What is the slope of the line that passes through the points: (6, -4), (15, -4)

Answer 1

Just another hint when finding slope. If you will stack the coordinates on top of of each other you will less likely get the x and y coordinates confused.

(x,y)

(6,-4)

(15,-4)

Now you can see that the y coordinates are -4 and -4 and the x coordinates are 15 and 6. Have a nice day!

Answer 2

slope formula (y2-y1)/(x2-x1)

(x1,y1) = (6,-4)

(x2,y2) = (15,-4)

slope = (-4-(-4))/(15-6) = 0/9 = 0

The slope is 0. This is a horizontal line.