How much is each question worth on a 45 question test?

The equation become y = -1600x + 16000.

It is a system of an equation in which the highest power of the variable is always 1. A one-dimension figure that has no width. It is a combination of infinite points side by side.

Given

A $16,000 robot depreciates linearly to zero in 10 years.

A formula for its value as a function of time, t, in years.

Let y be the cost of the robot and x be the time.

We know the equation of the line is y = mx + c

At the time of launch, its cost is $16,000 so the point becomes (0,16000) and after 10 years its cost becomes zero then the point becomes (10,0).

For the first point (0, 16000)

16000 = 0(x) + c

        c = 16000

For second point (10,0)

0 = 10(m) + 16000

m = -1600

Thus the equation become y = -1600x + 16000.

More about the linear system link is given below.

link