Question

Pls help

which equation describes the motion of the train?
d=50t
d=25t
d= t- 175
d= t + 25​

Answer 1

d = 25t

Explanation:

pick tow points on the line, the easier for me is (0,0) and (2,50). The equation options are given in slope intercept form such as y = mx + b; where m is the slope and be is where the line intercepts the y-axis. We can see that "b" is zero because the line intercepts the y-axis at 0 (b = 0).

to find the slope you use the two points for the m

m =
`((y2 - y1))/((x2 - x1))` =
`((50 - 0))/((2 - 0))` = 25 is the slope

Therefore the equation should d = 25t