Question

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A function f(x) is graphed on the coordinate plane.

Write the equation of the line.

Question 6 options:

f(x) = 4x - 2


f(x) = 1/4x - 2


f(x) = -4x + 2


f(x) = -4x - 2

Answer 1

To begin, find the slope of the line, to do this, pick two points and input them into the slope formula. Use (-1, 2) and (-2, 0)

Answer 2

What next?

Answer 3

After you have the slope, you can see that the y-intercept, or b, is -2. Do you have the slope?

Answer 4

1/4?

Answer 5

Yes! So now you can plug in the variables to get your equation, which would be:

f(x) = 1/4x -2

Answer 6

Thx

Answer 7

Oh wait! I just checked it, it is actually 4x, not 1/4! SORRY.

Answer 8

Oh okay

Answer 9

[img] https://learning.k12.com/d2l/common/viewFile.d2lfile/Database/NTk2Mzc3Ng/U4T%20Q8%20and%20Q9.png?ou=158736 [/img]

The graph shows the total fare, y, for a taxi ride with respect to the miles traveled, x.

What is the y-intercept and what does it represent?

Question 8 options:

The y-intercept is 3 and it represents the initial fee before any miles are traveled.


The y-intercept is 3 and it represents the cost of traveling 1 mile.


The y-intercept is 0 and it represents the initial fee before any miles are traveled.


The y-intercept is 20 and it represents the cost of the cab ride.