Driving speed and fuel consumption Exercise 9 (page 171) gives data on the fuel consumption y of a
car at various speeds x. Fuel consumption is measured
in liters of gasoline per 100 kilometers driven, and
speed is measured in kilometers per hour. A statistical
software package gives the least-squares regression line
ỹ = 11.058 - 0.01466x. Use the residual plot to deter-
mine if this linear model is appropriate.

Which expression gives you the distance between the points (5,1)and(9,-6)

Which situation is an example of an observational study?

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno step statement reason 1 ∠oln ≅ ∠lno given 2 draw oe as a perpendicular bisector to ln by construction 3 ∠leo ≅ ∠neo transitive property of equality 4 m∠leo = 90° definition of a perpendicular bisector 5 m∠neo = 90° definition of a perpendicular bisector 6 le ≅ en definition of a perpendicular bisector 7 δole ≅ δone side-angle-side (sas) postulate 8 ol ≅ on cpctc nina made two errors in the proof. identify and correct the errors.