Unit Rates & Proportions Unit Test

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Question
Use the image to answer the question.

A coordinate plane shows four quadrants with both the x-axis and the y-axis ranging from negative 10 to positive 10 in increments of 2. Two points are plotted and joined by a line. The plotted points are as follows: left parenthesis 4 comma 9 right parenthesis, left parenthesis 5 comma 0 right parenthesis. A line connects the two plotted points and extends beyond the points in both directions.

Find the slope of the line given its graph.

(1 point)
Responses

9
9

−9
negative 9

−412
negative 4 Start Fraction 1 over 2 End Fraction

−19
negative Start Fraction 1 over 9 End Fraction
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1 answer

To find the slope of the line given the two points \((4, 9)\) and \((5, 0)\), you can use the formula for the slope \(m\):

\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]

Here, \((x_1, y_1) = (4, 9)\) and \((x_2, y_2) = (5, 0)\).

Substituting the values into the slope formula:

\[ m = \frac{0 - 9}{5 - 4} = \frac{-9}{1} = -9 \]

Thus, the slope of the line is \(-9\).

The answer is:

\(-9\)