Question

Question #08422

Answer 1

The Quantity Q is related to quantity P linearly.
And with an increase in Q there is decrease in P.

Explanation:

The general equation of a straight line can be written as
`y=mx+c` ....(1)
Where `m` is the slope of the line and `c` is the intercept on the `x` axis.
In the graph presented in the question the slope `m` is a negative quantity.

It could be a case of uniform retardation. Where with increase of time plotted on the `x` axis, the velocity of the object decreases linearly.

Recall `v=u+at`, where `v, u, a and t` are final velocity, initial velocity, acceleration and time elapsed.

For retardation `a` would be a negative quantity as it is acting in a direction opposite to the direction of motion. The equation will look like
`v=-at+u`
Comparing with (1), one can find the retardation and initial velocity.