Identify the scenario that is a linear relationship or function. direct variation
index of refraction
pressure
work

Direct Variation

Step-by-step explanation:

it is not index refraction because-Refractive Index (Index of Refraction) is a value calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density. The refractive index variable is most commonly symbolized by the letter n or n' in descriptive text and mathematical equations.

It is not pressure because-Pressure is the force per unit area. The pressure exerted by a solid object onto another solid surface is the weight of the object divided by the area of the object's surface. The formula for pressure is: The unit of force is a Newton (N). The unit of area is a square metre (m 2).

It is not work because- work is defined as a force causing the movement—or displacement of an object.

therefore it has to be Direct Variation which is - A relationship between two variables in which one is a constant multiple of the other. In particular, when one variable changes the other changes in proportion to the first. If b is directly proportional to a, the equation is of the form b = ka (where k is a constant).

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

step-by-step explanation:

for the free