Using the concept of rise over run, explain the slope of a horizontal line.

The slope of a line, 'm', is defined as: 

m = (y2 - y1) / (x2 - x1) 

Now, take a look at that definition closely. The numerator is represents the function's change in the y-direction. The denominator represents the function's change in the x-direction. This is where the idea of "rise over run" comes from. "Rise" correlates to the y-direction, and "run" correlates to the x-direction. 

Now consider a horizontal line. It is horizontal, so that means the function does not change (i.e., remains constant) with respect to the y-direction. Mathematically speaking and considering the definition of slope defined above, no change in the y-direction means: 

y2 - y1 = 0 

If the numerator is zero, then that means the fraction will equal zero, which makes the slope equal to zero. 

Hope this helps!

Idon’t feel like doing the math but you need to do 2.24 divided by 7