QUESTION IMAGE
Question
- y = -4
slope (m) =
y-intercept (b) =
- y + x = 3
slope (m) =
y-intercept (b) =
- x = 3
slope (m) =
y-intercept (b) =
use the graph to identify the slope and y-intercept. then write the equation of the line in slope - intercept form.
- slope (m) =
y-intercept (b) =
equation:
- slope (m) =
y-intercept (b) =
equation:
- slope (m) =
y-intercept (b) =
equation:
Problem 10: \( y = -4 \)
Step 1: Recall slope of horizontal line
A horizontal line has a slope of \( 0 \) because there is no vertical change (rise) for any horizontal change (run). So, \( m = 0 \).
Step 2: Identify y - intercept
The equation \( y=-4 \) means that for all values of \( x \), \( y \) is always \( -4 \). The y - intercept is the value of \( y \) when \( x = 0 \), so \( b=-4 \).
Step 1: Recall slope - intercept form
The slope - intercept form of a line is \( y=mx + b \), where \( m \) is the slope and \( b \) is the y - intercept. For the equation \( y=-x + 3 \), the coefficient of \( x \) is the slope. So, \( m=-1 \).
Step 2: Identify y - intercept
In the equation \( y=-x + 3 \), when \( x = 0 \), \( y = 3 \). So, the y - intercept \( b = 3 \).
Step 1: Recall slope of vertical line
A vertical line has an undefined slope because the run (change in \( x \)) is \( 0 \), and division by \( 0 \) (for the slope formula \( m=\frac{\text{rise}}{\text{run}} \)) is undefined. So, the slope is undefined.
Step 2: Identify y - intercept
A vertical line \( x = 3 \) does not intersect the y - axis (except when \( x = 0 \), but \( x \) is always \( 3 \) here), so there is no y - intercept (or we can say it does not exist).
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slope (\( m \)) = \( 0 \)
y - intercept (\( b \)) = \( -4 \)