Question

I calculated the y-intercept but idk what it tells me

Answer 1

your y-intercept means when x= 0
here, x represents time
time = 0 means initially
so, y-intercept gives you INITIAL VELOCITY of the car

Answer 2

that is the velocity with which the car started

Answer 3

so the car started with 50miles/hr

Answer 4

Thank you! for the next one the equation is f(b)-f(a)/b-a?

Answer 5

yes, that formula is correct

Answer 6

so i don't have a function here what do i do

Answer 7

y = f(x)
its like,
f(b) means 'y' value at b

Answer 8

so f(3) means y value or velocity at x= 3 hrs

Answer 9

you got what i am trying to explain ?

Answer 10

f(3)-f(1)/3-1

Answer 11

yes, and what are f(3) and f(1) ?

Answer 12

that's what idk :( ik you explained but i still dont know what to do

Answer 13

we take f(x) as 'y'
so, f(3) means y value when x = 3
which = ... ?

Answer 14

see the table, what is y when x= 3 ?

Answer 15

oh it's 56

Answer 16

56-52/3-1

Answer 17

4/2
2

Answer 18

yes

Answer 19

correct and you know what it represents ?

Answer 20

2 miles per hour

Answer 21

The car increases it's speed by 2 miles per hour after every hour.

Answer 22

@hartnn

Answer 23

yes,
that means the rate of change of velocity is 2 miles/hour^2 which is actually the ACCELERATION of the car

Answer 24

so, average rate of velocity represents the accelration

Answer 25

domain would be 4 right for C?

Answer 26

when x = 4, is y = 60 ?

and domain is the set of values, not just 1 value

Answer 27

ohsorry :/

Answer 28

when x=4 y=58, when x=5 y=60

Answer 29

[50<x<60]?

Answer 30

yes, so x is 5 when y is 60

and domain is the set of "x" values
(set of y values is actually the RANGE)
so here, your domain will be
x = 0 to 5

Answer 31

but dont you have to say [0<x<5]

Answer 32

thats just a way to represent(interval notation), you can represent it in may ways

Answer 33

sorry if i'm being anoying

Answer 34

and thats not correct

Answer 35

i mean not accurate

Answer 36

annoying*

Answer 37

ok so I just put domain: 0 to 5

Answer 38

The domain would be integers from 0 to 5.

Answer 39

\(0 \le 0 \le 5\)

Answer 40

i mean
0 <= x <= 5

Answer 41

my point was just that u missed the "="
as x can actually take the values, 0 and 5

Answer 42

oh but i thought [] those represented could be equal

Answer 43

thats another notation

Answer 44

\([0,5]\)

Answer 45

\(0\le x \le 5 \\ [0,5]\)
both are same