Slope as Unit Rate Quick Check
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Question
Use the image to answer the question.
An illustration shows a coordinate plane with the x-axis ranging from negative 9 to 9 in one unit increments, and the y-axis ranging from negative 11 to 11 in one unit increments. A solid line passes through four plotted points and extends beyond. A solid line with arrows at both ends passes through points with coordinates left parenthesis 0 comma 0 right parenthesis, left parenthesis 2 comma negative 2 right parenthesis, left parenthesis 4 comma negative 4 right parenthesis, and left parenthesis 6 comma negative 6 right parenthesis. The solid line forms the hypotenuse for two triangles. The first triangle is marked with a dotted line and has vertices with coordinates left parenthesis 0 comma 0 right parenthesis, left parenthesis 0 comma negative 2 right parenthesis, and left parenthesis 2 comma negative 2 right parenthesis. The base is labeled as 2, and the perpendicular height on the left is labeled as 2. The second triangle is marked with a dashed line and has vertices with coordinates left parenthesis 2 comma negative 2 right parenthesis, left parenthesis 2 comma negative 6 right parenthesis, and left parenthesis 6 comma negative 6 right parenthesis. The base is labeled as 4, and the perpendicular height on the left is labeled as 4.
What is the slope of the line?
(1 point)
Responses
−2
negative 2
2
2
−1
negative 1
1
1
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The slope of the line can be found by calculating the change in the y-coordinate divided by the change in the x-coordinate between two points on the line.
From the given coordinates, we can choose two points to calculate the slope. Let's choose the points (0, 0) and (2, -2).
The change in y-coordinate is -2 - 0 = -2.
The change in x-coordinate is 2 - 0 = 2.
Therefore, the slope of the line is -2/2 = -1.
So the correct answer is -1.
To find the slope of a line, we can use the formula:
slope = (change in y-coordinates) / (change in x-coordinates)
Let's find the change in y-coordinates first. The line passes through the points (0, 0) and (6, -6), so the change in y-coordinates is -6 - 0 = -6.
Next, let's find the change in x-coordinates. The line passes through the points (0, 0) and (6, -6), so the change in x-coordinates is 6 - 0 = 6.
Now, we can calculate the slope:
slope = (-6) / 6 = -1
So, the slope of the line is -1.