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Apolline is mowing lawns for a summer job. For every mowing job, she charges an initial fee plus a constant fee for each hour of work. Her fee for a 5 -hour job, for instance, is 
$42. Her fee for a 3 hour job is 
$28.
Let 
y represent Apolline's fee (in dollars) for a single job that took 
x hours for her to complete.
Which of the following information about the graph of the relationship is given?
Choose 1 answer:
(A) Slope and 
x-intercept
(B) Slope and 
y-intercept
(C) Slope and a point that is not an intercept
(D) 
x-intercept and 
y intercept
(E) 
y-intercept and a point that is not an intercept
(F) Two points that are not intercepts

Apolline is mowing lawns for a summer job. For every mowing job, she charges an initial fee plus a constant fee for each hour of work. Her fee for a 55 -hour job, for instance, is $42 \$ 42 . Her fee for a 33 hour job is $28 \$ 28 .\newlineLet y y represent Apolline's fee (in dollars) for a single job that took x x hours for her to complete.\newlineWhich of the following information about the graph of the relationship is given?\newlineChoose 11 answer:\newline(A) Slope and x x -intercept\newline(B) Slope and y y -intercept\newline(C) Slope and a point that is not an intercept\newline(D) x x -intercept and y y intercept\newline(E) y y -intercept and a point that is not an intercept\newline(F) Two points that are not intercepts

Full solution

Q. Apolline is mowing lawns for a summer job. For every mowing job, she charges an initial fee plus a constant fee for each hour of work. Her fee for a 55 -hour job, for instance, is $42 \$ 42 . Her fee for a 33 hour job is $28 \$ 28 .\newlineLet y y represent Apolline's fee (in dollars) for a single job that took x x hours for her to complete.\newlineWhich of the following information about the graph of the relationship is given?\newlineChoose 11 answer:\newline(A) Slope and x x -intercept\newline(B) Slope and y y -intercept\newline(C) Slope and a point that is not an intercept\newline(D) x x -intercept and y y intercept\newline(E) y y -intercept and a point that is not an intercept\newline(F) Two points that are not intercepts
  1. Define Variables: Let's denote the initial fee that Apolline charges as b b (which will be the y-intercept of the graph) and the constant fee per hour as m m (which will be the slope of the graph). We can then express Apolline's fee for a job as y=mx+b y = mx + b , where y y is the total fee and x x is the number of hours worked.
  2. Calculate Slope: We are given two points: (55, 4242) for a 55-hour job and (33, 2828) for a 33-hour job. These points can be used to find the slope m m of the graph. The slope m m is calculated by the change in y y divided by the change in x x , which is (4228)/(53) (42 - 28) / (5 - 3) .
  3. Find Y-Intercept: Performing the calculation for the slope m m , we get m=(4228)/(53)=14/2=7 m = (42 - 28) / (5 - 3) = 14 / 2 = 7 . So, Apolline charges \(7\) per hour of work.
  4. Determine Initial Fee: Now that we have the slope \( m \), we can use one of the points to find the y-intercept \( b \). Let's use the point (\(5\), \(42\)). Plugging these values into the equation \( y = mx + b \), we get \( 42 = 7(5) + b \).
  5. Describe Graph: Solving for \( b \), we have \( 42 = 35 + b \), which gives us \( b = 42 - 35 = 7 \). Therefore, the initial fee that Apolline charges is 77.
  6. Identify Given Information: With the slope m=7 m = 7 and the y-intercept b=7 b = 7 , we have enough information to describe the graph of the relationship. The slope corresponds to the constant fee per hour, and the y-intercept corresponds to the initial fee.
  7. Identify Given Information: With the slope m=7 m = 7 and the y-intercept b=7 b = 7 , we have enough information to describe the graph of the relationship. The slope corresponds to the constant fee per hour, and the y-intercept corresponds to the initial fee.The question asks which of the following information about the graph is given. We have determined both the slope and the y-intercept from the information provided. Therefore, the correct answer is (B) Slope and y-intercept.

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