Product is times so try that as it’s the product of a number
So, we'll say Mia gets $4.50 a day, since a standard weekend is two days, therefore adding up to $9 a weekend. So if Mia were to do her chores for 4 weekends, she'd have a total of $36 but not $40. So if she were to work an extra weekend, so 5 weekends, she'd have a total of $45. So you can say 5 weekends in order to earn more than $40.
Yes it is correct. You plotted the slope and initial rate value correctly and found the
point of intersection.
Which graph is the graph of this function?

if

So the graph is A.
Hope i've helped!