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
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 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
Define Variables: Let's denote the initial fee that Apolline charges as b (which will be the y-intercept of the graph) and the constant fee per hour as m (which will be the slope of the graph). We can then express Apolline's fee for a job as y=mx+b, where y is the total fee and x is the number of hours worked.
Calculate Slope: We are given two points: (5, 42) for a 5-hour job and (3, 28) for a 3-hour job. These points can be used to find the slope m of the graph. The slope m is calculated by the change in y divided by the change in x, which is (42−28)/(5−3).
Find Y-Intercept: Performing the calculation for the slope m, we get m=(42−28)/(5−3)=14/2=7. So, Apolline charges \(7\) per hour of work.
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 \( 42 = 7(5) + b \).
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 7.
Identify Given Information: With the slope m=7 and the y-intercept 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.
Identify Given Information: With the slope m=7 and the y-intercept 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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