What are the domain and range for the function f(x)= 26-2x

Question

Help me please

Answer 1

f(x)= 26-2x

 

The domain is all possible input values for x

Since there are no restrictions on x the domain is

all real numbers.   d = (-∞, ∞)

 

The range is all possible output values for f(x)

Note that as x gets larger in the positive direction,

f(x) gets larger in the negative direction ... f(x) → -∞

 

As x gets larger in the negative direction,

f(x) gets larger in the positive direction ... f(x) → ∞

 

Thus the overall range is again all real numbers

r = (-∞, ∞)