For 12 city buses, the line predicting fuel use y in liters from route length x in kilometers is $\hat{y}=18+0.42x$. What does the slope mean?

For 15 tomato seedlings, the line predicting height y in centimeters from age x in weeks is $\hat{y}=6.1+2.8x$. What does the slope mean?

For 18 courier deliveries, the line predicting delivery time y in minutes from distance x in kilometers is $\hat{y}=9.5+4.6x$. Interpret the slope.

For 20 factory batches, the line predicting defects y per batch from machine speed x in parts per minute is $\hat{y}=1.2+0.07x$. What does the slope say?

For 16 phones, the line predicting battery used y in percentage points from streaming time x in hours is $\hat{y}=5+12.4x$. Interpret the slope.

For 10 aquarium tanks, the line predicting water temperature y in °C from heater setting x in watts is $\hat{y}=18+0.03x$. What is the slope's meaning?

For 14 school fundraisers, the line predicting donations y in dollars from posters printed x is $\hat{y}=120+7.5x$. Explain the slope.

For 13 bike commutes, the line predicting energy used y in kilocalories from distance x in kilometers is $\hat{y}=35+28x$. What does the slope mean?

For 19 backpacks, the line predicting mass y in kilograms from number of notebooks x is $\hat{y}=1.1+0.32x$. Interpret the slope.

For 14 algae cultures, the line predicting dry mass y in milligrams from light exposure x in hours is $\hat{y}=15+3.4x$. What does the slope mean?

For 11 used electric scooters, the line predicting price y in dollars from age x in months is $\hat{y}=420-18x$. What does the y-intercept mean?

For 17 school cafeterias, the line predicting salads sold y from outdoor temperature x in °C is $\hat{y}=52+6.3x$. Interpret the y-intercept.

For 20 computer repairs, the line predicting cost y in dollars from labor time x in hours is $\hat{y}=35+48x$. What does the y-intercept represent?

For 15 treadmill tests, the line predicting heart rate y in beats per minute from speed x in kilometers per hour is $\hat{y}=68+12x$. Interpret the y-intercept.

For 18 apartments, the line predicting daily water use y in liters from number of showers x is $\hat{y}=90+42x$. What does the y-intercept mean?

For 20 students, the line predicting test score y in points from study time x in hours is $\hat{y}=61+5.5x$. Explain the y-intercept.

For 12 shipped boxes, the line predicting package mass y in kilograms from number of items x is $\hat{y}=0.4+1.2x$. What does the y-intercept mean?

For 16 garden plots, the line predicting yield y in kilograms from fertilizer x in grams is $\hat{y}=12+0.08x$. Interpret the y-intercept.

For 16 schools, $\hat{y}=410+1.6x$ predicts average reading score y from daily reading time x in minutes. A student says adding 10 minutes raises scores by 16 points. What is the flaw?

For 14 coffee shops, $\hat{y}=350-4.5x$ predicts cups sold y from temperature x in °C. A student says each extra cup sold predicts temperature 4.5 °C lower. What is the flaw?

For 13 used trucks, $\hat{y}=31-0.09x$ predicts price y in thousands of dollars from mileage x in thousands of kilometers. A student says 31 is the average truck price. What is the flaw?

For 18 beach kiosks, $\hat{y}=20+14x$ predicts sunscreen bottles sold y from UV index x. A student says sales rise 14 percent for each one-unit UV increase. What is the flaw?

For 12 printers, $\hat{y}=38-1.9x$ predicts speed y in pages per minute from age x in years. A student says each additional year lowers speed by 38 pages per minute. What is the flaw?

For 18 gyms with fees from $20 to $90, $\hat{y}=980-7.2x$ predicts members y from monthly fee x in dollars. A student predicts -460 members at a $200 fee. What is the flaw?