Question

Select all the correct answers.

Answer 1

Answer:

The functions are both increasing.

The function for plan II has a greater unit rate.

The function for plan I has a greater y-intercept.

Step-by-step explanation:

In plan I, he is required to make a one-time investment of $12,000 and then equal monthly investments of $400.

In equation forms, it is :

$y=12000+400x$

Where 'x' is the number of months elapsed.

Plan 2 can be shown as :

$y=11000+420x$

Now, the correct statements about the functions are:

1. As both are linear functions, they are increasing here. The functions are both increasing.

2. The function for plan II has a greater unit rate. Unit rate is $420 per month(x).

3. The function for plan I has a greater y-intercept.

Lets check this-

for 3 months we can check like-

$y=12000+400(3)$

$y=12000+1200$

y=13200

$y=11000+420(3)$

$y=11000+1260$

y=12260

Answer 2

the functions are both increasing

the functions for plan II had a greater unit rate

and the functions for plan I has a greater y intercept