Question
Graph the following equation by plotting two points.
Ask by Chen Reeves. in the United States
Mar 25,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
Plot the points (2, -3) and (9, -1) on a coordinate plane and draw a straight line through them.
Solution
-
Start with the given equation in point–slope form:
-
Identify the fixed point and the slope.
From the equation, the line passes through the pointand has a slope of -
To plot two points, use the known point and find another point by using the slope.
Since the slope is, it means that for an increase of in , increases by .
Starting from: - Increase
by : .
Then,
So, the second point is. - Increase
-
Alternatively, you can verify by converting the equation to slope–intercept form:Express
as : The y-intercept is. However, plotting and from the step–slope form is generally simpler. -
Finally, plot the points
and on a coordinate plane and draw a straight line through them, which represents the graph of the equation.
Thus, the two points to plot are:
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Bonus Knowledge
To graph the equation
, let’s first rewrite it in slope-intercept form
. Start by rearranging the equation:
-
Subtract 3 from both sides:
-
Distribute the
: -
To combine terms, convert -3 to a fraction:
Now, let’s plot two points.
Point 1: When
:
So, the first point is
.
Point 2: When
:
So, the second point is
.
With points
and
, you can now plot these on a graph and connect them to create a line!