The answer is: Rational coefficient.
The explanation for this answer is shown below:
1. By definition, a rational number has the form 
where 
is the numerator and 
is the denominator. The numerator and the denominator are integers.
2. By definition, integers numbers includes positive numbers, negative numbers and zero.
3. Keeping the information above on mind, you can conclude that the answer is: Rational coefficient.
4. For example:
is a rational coefficient.
Answer:
Cost for 68 words = 148 naira
Step-by-step explanation:
Given that:
Cost of first ten words = 32 naira
Cost of additional words = 2 naira per word
Let,
x be the number of additional words.
y be the total cost
y = 2x + 32
We have to find the cost for 68 words.
The cost of first 10 words will be 32 naira.
Additional words = 68 - 10 = 58 words
Putting x = 58 in the equation
y = 2(58) + 32
y = 116 + 32
y = 148
Hence,
Cost for 68 words = 148 naira
