Question

The equation y=1.07x+3.91 models the number of pieces of junk mail a person receives in a week, where x represents the number of credit cards he or she has.

What does the y-intercept represent in the context of the situation?
A. A person with 1 credit card can expect about 4 pieces of junk mail in a week
B. A person with no credit cards can expect about 1 piece of junk mail in a week
C. A person with no credit cards can expect about 4 pieces of junk mail in a week
D. A person with 1 credit card can expect about 1 piece of junk mail in a week

Answer 1

Concept:
The general equation of line is y=mx+c ; c is the y intercept where x=0.
Now,
the given equation y=1.07x+3.91 so when we put x=0( no. of credit cards become zero) and y intercept become 3.91 almost 4.

Option C is correct