In the [tex]$xy$[/tex]-plane, the slope of the line [tex]$y = mx - 4$[/tex] is less than the slope of the line [tex]$y = x - 4$[/tex]. Which of the following must be true about [tex]$m$[/tex]?

A. [tex]$m = -1$[/tex]
B. [tex]$m = 1$[/tex]
C. [tex]$m \ \textless \ 1$[/tex]
D. [tex]$m \ \textgreater \ 1$[/tex]



Answer :

To determine the value of [tex]\(m\)[/tex] such that the slope of the line [tex]\(y = mx - 4\)[/tex] is less than the slope of the line [tex]\(y = x - 4\)[/tex], we should compare their slopes directly.

1. Identify the slope of each line:
- The line [tex]\(y = mx - 4\)[/tex] has a slope of [tex]\(m\)[/tex].
- The line [tex]\(y = x - 4\)[/tex] has a slope of 1.

2. Establish the relationship based on the given condition:
- We need the slope of [tex]\(y = mx - 4\)[/tex] (which is [tex]\(m\)[/tex]) to be less than the slope of [tex]\(y = x - 4\)[/tex] (which is 1).

3. Write the resulting inequality:
[tex]\[ m < 1 \][/tex]

Given the condition that we need the slope of [tex]\(y = mx - 4\)[/tex] to be less than 1, the inequality [tex]\(m < 1\)[/tex] must be true. Therefore, the correct answer is:
[tex]\[ m < 1 \][/tex]