Question

Which of the following choices can be a proper first line of a function?

A. [a,b]=motion(t)
B. function y= distance-meter( (x)
C. function [x,y,z]=coordinates(t)
D. a= absolute-value(A)

Answer 1

The proper first line of a function typically starts with the keyword 'function', followed by the function name, input parameters, and an equal sign. Choice C. function [x,y,z]=coordinates(t) is a proper first line of a function.

Step-by-step explanation:

The proper first line of a function typically starts with the keyword function, followed by the function name, any input parameters enclosed in parentheses, and an equal sign. Let's examine each choice:

1. A. [a,b]=motion(t) - This is not a proper first line of a function because it does not start with the keyword function.
2. B. function y=distance_meter(x) - This is a proper first line of a function because it starts with the keyword function and includes a function name distance_meter and an input parameter x.
3. C. function [x,y,z]=coordinates(t) - This is a proper first line of a function because it starts with the keyword function and includes multiple output parameters x, y, and z, and an input parameter t.
4. D. a=absolute_value(A) - This is not a proper first line of a function because it does not start with the keyword function.

Therefore, the answer is choice C. function [x,y,z]=coordinates(t).