1. Does tire pressure have an effect on gas mileage? Your manual for your car recommends your tires to have a tire pressure of 22 psi. You design an experiment to see is tire
pressure affects gas mileage. You fill your car up with gas, check the tire pressure to
make sure it is at 22 psi, reset the odometer trip to "zero", and drive your car until your
tank of gas is empty. To have an accurate reading, you check your tire pressure every 2
days. Once the first tank of gas is emptied, you fill your car up again with the same gas
from the same gas station. You now increase your tire pressure to 32 psi, reset the
odometer trip to "zero", and drive your car until your tank of gas is empty. To have an
accurate reading, you check your tire pressure every 2 days. Once the second tank of gas
is emptied, you fill your car up again with the same gas from the same gas station. You
now decrease your tire pressure to 15 psi, reset the odometer trip to "zero", and drive
your car until your tank of gas is empty. To have an accurate reading, you check your tire
pressure every 2 days.
The dependent variable in this experiment is...!
the tire pressures of 15 and 32 psi.
When the car was driven as 22 psi.
change in gas mileage.
When the car was driven at 15 psi and 32 psi.