Police investigating traffic accidents often estimate the speed of a vehicle by measuring
the length of the tire skid distance. The following table gives the average tire skid
distance for an automobile with good tires on dry pavement.
Tire Skid Distance
(in feet)
Speed
(in miles per hour)
25 28
54 35
89 45
132 55
184 65
244 75
313 85
1. Find the linear regression equation: .
2. Estimate the speed of a vehicle with the following tire skid mark distances:
(are you finding x or y?)
a) 150 feet
b) 200 feet
3. Find the tire skid distance of a car travelling at the following speeds:
(are you finding x or y?)
a) 52 miles per hour
b) 105 miles per hour

60

step-by-step explanation:

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v