Question

Sam is observing the velocity of a car at different times. After three hours, the velocity of the car is 51 km/h. After five hours, the velocity of the car is 59 km/h.

Part A: Write an equation in two variables in the standard form that can be used to describe the velocity of the car at different times. Show your work and define the variables used. (5 points)

Answer 1

I TAG u in something it has the answer

Answer 2

Hold on i know the answer

Answer 3

ok, to your problem, you have 2 things: hour and velocity, right? it says 3 hours--------51m/s 5hours ---------59m/s got it?

Answer 4

@Lydia4goals You there?

Answer 5

i don't think so

Answer 6

Now, ignore the word, just focus on the numbers, you have 2 points (3, 51) and (5,59) . Got what I mean?

Answer 7

I'm just goign to explain ti then she can figure it out on her own

Answer 8

okay yeah

Answer 9

to write an equation of a line, you need : 1/ slope. (can get it from 2 points) 2/ 1 point .

Answer 10

ok good your here

Answer 11

1/ SLOPE: We have a formula to find it from 2 given points, it says m = y2−y1x2−x1 can you show me how to apply our 2 points to this formula? YOUR TURN!!!

Answer 12

The slope would be 4 right?

Answer 13

sorry i was trying to solve it

Answer 14

you are correct, now 2/ pick 1 point, either of them , which one?

Answer 15

(3, 51).

Answer 16

ok, the last step is put slope, point into formula: y−y0=m(x−x0) YOUR TURN!!!

Answer 17

59-51=4(x-3)??

Answer 18

correct
now...

Answer 19

huh?

Answer 20

What do you mean huh?

Answer 21

y = 4(x - 3) + 51 you should get this then open the parentheses.

Answer 22

so, our equation should be v = 4t +39 THIS IS YOUR ANSWER <---
Your welcome! :)