The sum of a rational number and a positive integer is rational.
a) always true b) sometimes true c) usually true d) never true

Step-by-step explanation:

Always True

Positive integers are rational numbers. Adding two rational numbers produces another rational number.

(1,4) is on graph of f(x)

f(1) = 4

so 1/4 f(x)

1/4 f(1)

1/4. ×4

1

so point for function 1/4. f(x) is (1,1)

the thermometer is precise but not accurate

step-by-step explanation: