@phi @mathstudent55 HELP ME PLEASE

Question

@phi @mathstudent55  HELP ME PLEASE

anonymous · Answer

The graph below plots a function f(x).

graph of line segment going through ordered pairs 0, 50 and 2,100 and extend beyond 2,100

If x represents time, the average rate of change of the function f(x) in the first two seconds is

anonymous · Answer

@RC_CA you think you can help?

anonymous · Answer

hello @RC_CA @phi @thomaster @mathstudent55

mathstudent55 · Answer

Find the slope using the points (0, 50) and (2, 100).

anonymous · Answer

Im not really good at this can you tell me how?

phi · Answer

they are asking you to find the slope of the line.  change in y divided by change in x

anonymous · Answer

okay? so what do i put as the answer?

phi · Answer

see http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/slope-and-intercepts/v/slope-of-a-line-2 for how to do this. It is short.

anonymous · Answer

waitwaitwait...count up and then over?

phi · Answer

when they give you the numbers you can use subtraction

mathstudent55 · Answer

For points $ (x_1, y_1) $ and $(x_2, y_2) $, the slope, m, of the line through them is

$m = \dfrac{y_2 - y_1}{x _2 - x_1} $

anonymous · Answer

do what?

phi · Answer

take 5 minutes and watch Khan

anonymous · Answer

okay im gonna watch it...not saying i will know how to do this but im watching

anonymous · Answer

okay i watch it but my graph doesn't give the values.

phi · Answer

ordered pairs (0, 50) and (2,100)

anonymous · Answer

@phi

phi · Answer

can you find the change in y?