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Select the slope-intercept form of an equation for a line with a [tex]\( y \)[/tex]-intercept of -5 and a slope of 2.

A. [tex]\( y = 2x + 5 \)[/tex]

B. [tex]\( y = 2x - 5 \)[/tex]

C. [tex]\( y = 5x - 2 \)[/tex]

D. [tex]\( y = -5x + 2 \)[/tex]


Sagot :

To determine the correct equation of a line in slope-intercept form, we need to use the formula [tex]\( y = mx + b \)[/tex], where [tex]\( m \)[/tex] represents the slope and [tex]\( b \)[/tex] represents the y-intercept.

We are given the following values:
- The y-intercept ([tex]\( b \)[/tex]) is -5
- The slope ([tex]\( m \)[/tex]) is 2

Substituting these values into the slope-intercept formula, we get:
[tex]\[ y = 2x - 5 \][/tex]

Now, let's compare this with the given options:

A. [tex]\( x = 2x + 5 \)[/tex] - This is not in the correct form.

B. [tex]\( y = 2x - 5 \)[/tex] - This equation matches our derived equation.

C. [tex]\( y = 5x - 2 \)[/tex] - This has the slope and y-intercept reversed.

D. [tex]\( y = -5x + 2 \)[/tex] - This has the incorrect slope and y-intercept.

The correct choice is:
[tex]\[ \boxed{y = 2x - 5} \][/tex]

So the answer is:
B. [tex]\( y = 2x - 5 \)[/tex]