What are the factors in 4x+12

Extract the common constant factor of 4 to get

4x+12=4(x+3)

Step-by-step explanation:

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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 :

Where 'x' is the number of months elapsed.

Plan 2 can be shown as :

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=13200

y=12260