Help!!

find the equation of the line. use exact numbers.

look at the picture please!

We need 2 points so we'll choose

(-2, 0) and (0, 4)

The slope is (4 -0) / (0, --2)

=  2

We'll use one point (-2, 0) and this equation:

(y - Y1) = m * (x - X1)

(y - 0) = 2 • (x --2)

y = 2x + 4

Step-by-step explanation:

the barter

- "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."