What can I do with a coordinations and the slope
1 answer:
You can plot a linear equation, if you are given the coordinates and the slope for THE SAME line.
Assuming you have those, the first step is to find the y-intercept.
That is done by replacing and
in the general formula by their coordinated counterparts, and replacing
by the slope that is given to you.
Let's assume the coordinates you are given are , and the slope you are given is 1.
By substituting into the general formula...
...we can see that it is possible to find the y-intercept ().
Knowing the y-intercept, it is possible to plot the line and solve any question.
I'll leave a picture of the example used above when graphed.
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Given:
Last year Lira earned $12,000 less than her husband Todd.
Together they earned $75,000.
To find:
The amount earned by Lira in last year.
Solution:
Let x be the amount earned by Lira's husband inn last year.
Last year Lira earned $12,000 less than her husband Todd.
Amount earned by Lira =
Total amount earned by Lira and her husband =
=
Together they earned $75,000.
Now,
Amount earned by Lira =
=
=
Therefore, the amount earned by Lira in last year is $31500.
Since you are given the area, we can solve for radius with this equation:
The radius is 11, so the diameter must be 2 times that, which is 22. With the correct units, the answer is 22 units²
The radius is 11, so the diameter must be 2 times that, which is 22. With the correct units, the answer is 22 units²