Which measurement is most precise? A. 16 years
B. 40.01 years
C. 21.1 years
D. 1000 years

A

Step-by-step explanation:

Distinguish exact and uncertain numbers; Correctly represent uncertainty in quantities using significant figures.

answer A

Step-by-step explanation:

it has a exact amount of years with no decimals

It must have the same slope as the given line, so

m = -A/B = -1/-2 = 1/2

So far, we have

y = mx + b = x/2 + b

Use the given point to find b.

4 = -2/2 + b = -1 + b

b = 5

y = x/2 + 5

Multiply through by 2.

2y = x + 10

Standard form:

x - 2y = -10