The length of DF is ___ , its slope is _ , and its midpoint is (_ , _ ).

Step-by-step explanation:

The distance formula or the Pythagorean theorem will tell you the length of DF:

  DF = √((m -0)² +(0 -n)²)

  DF = √(m² +n²)

The slope can be found from the slope formula or by looking at rise/run.

  slope = rise/run

  slope = -n/m

The midpoint is the average of the end points:

  midpoint = ((0, n) +(m, 0))/2

  midpoint = (m/2, n/2)

y = 3x+4

step-by-step explanation:

to find the slope

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

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

the answer is d

hope this