Which expression can be used to find the slope of a line containing the points (–3, 2) and (7, –1)?

When 2 points are given, you would use the point slope formula.  y-yo = m(x-xo). You may also use a different formula.  P1 (x , y) and P2 (z , h)

then slope of line = ( h - y)/ (z - x)

so, apply this formula here also

slope of line = (-1-2)/(7- {-3})

                       (-3)/(10)

Where yo = either of the 2 point y coordinates

          xo = either of the 2 point x coordinates (paired with the above point)

          m = the slope

In this case,  m = (-1-2)/(7+3) = -3/10

Using point 1,

                            y-2 = (-3/10)(x+3) = (-3/10)x -9/10 or        y = (-3/10)x + 11/10

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

pls refer ro the top for answer