Question

The table below represents the velocity of a car as a function of time:
The average rate of change of the function between X= 15 to X= 29 is ____ m/s to the second power and represents the car's acceleration.
Please help!

Answer 1

for the average rate of chainge in velocity, you can imagine a line through those 2 endpoints. The slope of that is the average change over that interval

Answer 2

Oh so it's 2?

Answer 3

points (time, distance) .. (t , X)

Answer 4

not sure , how much time has elapsed from X=15 to X=29 on your table

Answer 5

42

Answer 6

ok, then the slope is the change in X over the change in time

(29 - 15) / 42

Answer 7

So it's 3????

Answer 8

@Danjs 3?

Answer 9

what are the two points X=15,t=? X=29, t=?

Answer 10

I have no idea/:

Answer 11

just the slope, difference in the X, over difference in the time t

(29-15) / 42 = 14/42, simploify to reduced fraction

Answer 12

i don't either, you have the table not me.. :)

Answer 13

Ohhhh X= 15 f(X)= 45
X= 29 f(X)= 87

Answer 14

ok then x is the time here, and f(x) is the velocity

average accel = change in velocity / change in time

= (87 - 45) / (29 - 15) m/s^2

Answer 15

So what should I put as the answer?

Answer 16

= 42 / 14

= 6 / 2 = 3 m/s^2

Answer 17

So 3? Thank you so much!

Answer 18

welcome