If x1 is the number of cars taking the ABD route and x2 is the number of cars taking the ACT route, write a linear expression for the travel time of a car taking the ABD route. Do the same for the ADD route.

The travel time for the car = Distance(Route-ABD)/Velocity of the car

t = d/v, where t is the travel time of the car, d is the distance traveled by the car along ABD, v is the velocity of the car.

For ADD route, ADD distance not mentioned in the question.

Notwithstanding, the travel time is given as :

t = Distance (ADD)/v

Step-by-step explanation:

The velocity is a physical quantity, which is defined as the rate of change of displacement with time.

That is, velocity = Displacement/time.

OR

Velocity(or speed) = Distance covered/traveled time.

The car is the question above traveled a distance(say d-meters) in the given route(ABD). It covered the distance in time, t(secs) with a velocity of v(m/s).

From the equation for velocity

v = d/t.

Making t the subject of formula,

travel time, t = d/v

Step-by-step explanation:

Given:

Glyder's Parachutes manufactures and sells parachutes of various types and prices. Also  3 charts prepared at the end of the year

I chart between days of production and Number of

Parachutes Produced shows that when former increases, the latter also increases.

Hence direct variation

II chart between  Purchase Price

of Parachute  and Number of

Parachutes sold:

Here when purchase price increases ,sales price also will increase resulting in less number of sales.

Hence indirect variation

III CHart shows that  that the purchase price of a parachute with the cost to produce the parachute.

Here when apurchase price of a parachute increases, automatically cost to produce would increase.

Hence direct variation