Question

If \[f(x) = 3x - 5\] then how do you find the value of the function for two?

Answer 1

Hint: For such question you need to see the function, that how the function is defined then for the given number for which the question is asked for is to be placed on the position of the variable and then obtained the value of the function for that value, it may be positive negative or zero.

Complete step-by-step solution:
The given function for the question is \[f(x) = 3x - 5\]
Now we have to find the value of the function for two, for that instead of the variable we have to put the value two, and then solve the equation. After doing calculation what we will get is the answer, for the given question.
On solving we get:
\[
   \Rightarrow f(x) = 3x - 5 \\
   \Rightarrow for\,x = 2\,we\,get \\
   \Rightarrow f(2) = 3(2) - 5 \\
   \Rightarrow f(2) = 6 - 5 = 1 \\
 \]
So the value of the function for two is one.
Additional Information: The given question is very easy to solve because only a linear equation is given with two terms, but for higher degree equations, the equation must be first simplified by taking common or simplifying the equation and then we can move forward.

Note: The given question needs the value of the function for two, for this we can also plot the graph of the given function and then after obtaining the graph we can see the value of the function for two, the answer would be same from both the method, the graph method can be more reliable here because the given function is linear and graph can be easily plotted.