Question

I will award you! :)

A car is traveling on a highway. The distance (in miles) from its destination and the time (in hours) is given by the equation d=420-65t. What is the practical meaning of the d-intercept?


a.
Initially the car is 355 miles from its destination.
b.
Initially the car is 420 miles from its destination.
c.
Initially the car is 65 miles from its destination.
d.
Initially the car is 485 miles from its destination.

Answer 1

The d-intercept (which is really just what you are used to calling the y-intercept, here we are just using a different variable) occurs where t=0 (what you are used to seeing as x).

Answer 2

So if t=0, what does that mean IN THE CONTEXT of this problem? What is that, in terms of the model?

Answer 3

d = 420 :)

Answer 4

b. Initially the car is 420 miles from its destination.

Answer 5

YES :)

Answer 6

Can i ask you another one? :)

Answer 7

go for it

Answer 8

Consider the equation y=-2x+5. Create a table of five ordered pairs that satify the equation. What is the y-intercept of the equation? What is the x-intercept of the equation?

a. y-intercept (5, 0); x-intercept (-5/2,0)
b. y-intercept (0, 5); x-intercept (0, 5/2)
c. y-intercept (5, 0); x-intercept (5/2, 0)
d. y-intercept (0, 5); x-intercept (5/2, 0)

Hope you can help! :)

Answer 9

may be you should tag someone one i don't know this one sorry