Answer:
Option B is the answer - For each additional door she knocks on, her earnings increase by $7.
Step-by-step explanation:
The linear equation is given as :
[tex]E(x)=7x-25[/tex]
Now we will check the equation by putting values of x in it.
Say if Jessica knocks 10 doors ,
[tex]E(10)=7(10)-25[/tex] = $45
If she knocks 11 doors ,
[tex]E(11)=7(11)-25[/tex] = $52
If she knocks 12 doors ,
[tex]E(12)=7(12)-25[/tex] = $ 59
Rate of change is [tex]59-52=7[/tex]
[tex]52-45=7[/tex]
We can see that, there is a constant increase of $7 with each increased door she knocks.
Therefore, option B is the answer.
