Step-by-step explanation:
To know how much does the airplane weighs, we need to find the linear equation that relates the amount of fuel x and the weight of the plane y.
First, we need to find the slope of the line. It can be calculated as:
![m=(y_2-y_1)/(x_2-x_1)](https://img.qammunity.org/2023/formulas/mathematics/high-school/78uaqhwt0aws3qfwxigaftpihnmb1gzxtp.png)
Where x1 and x2 are two amounts of fuel and y1 and y2 are the respective weight of the plane. So, replacing x1 = 18 gallons, y1 = 2017 pounds, x2 = 52 gallons, y2 = 2238 pounds, we get:
![m=(2238-2017)/(52-18)=(221)/(34)=6.5](https://img.qammunity.org/2023/formulas/mathematics/college/mwho0s2zorzwne3v6knaqgzgkhep98qlvh.png)
Now, the equation of the line will be
![y-y_1=m(x-x_1)](https://img.qammunity.org/2023/formulas/mathematics/high-school/csobd57zth7rh9k4hz9amldzpq2owf0z4j.png)
Where m = 6.5 and x1 = 18 gallons and y1 = 2017 pounds
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