Under plan a a 2 minute call costs .54 cents a 4 minute call costs 1.08. under plan b the cost for x minutes is given by y=0.289x. which plan is cheaper? why?

Plan A is cheaper, because the cost of a 2-minute call and a 4-minute call is less than the cost of a 2-minute call and a 4-minute of Plan B call.

Step-by-step explanation:

1. You have the following information of Plan A:

- A 2 minute call costs .54 cents.

- A 4 minutes call costs $1.08.

2. For Plan B, you know that the cost of is given by the equation:

3. Therefore, you can compare both plans by finding the cost of a call of 2 minutes and a call of 4 minutes of Plan B. You can calculate this by giving these values to :

4. Substitute the values into the equation:

(This is more expensive)

(This is more expensive)

5. Therefore, Plan A is cheaper, because the cost of a 2-minute call and a 4-minute call is less than the cost of a 2-minute call and a 4-minute of Plan B call.

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is