SOLUTION: Write the equation of the line that passes through point (0, -5) with a slope of 9/7. The fraction is throwing me off for some reason and I cannot seem to get this right. Thank

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Question 114087This question is from textbook Beginning Algebra
: Write the equation of the line that passes through point (0, -5) with a slope of 9/7.
The fraction is throwing me off for some reason and I cannot seem to get this right. Thanks! This question is from textbook Beginning Algebra

Found 2 solutions by stanbon, MathLover1:
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
Write the equation of the line that passes through point (0, -5) with a slope of 9/7.
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Y = (9/7)x -5
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Cheers,
Stan H.
Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

you can write the fraction as decimal number if you divide nominator by denominator:


Solved by pluggable solver: FIND a line by slope and one point

What we know about the line whose equation we are trying to find out:

  • it goes through point (0, -5)

  • it has a slope of 1.28571428571429



First, let's draw a diagram of the coordinate system with point (0, -5) plotted with a little blue dot:



Write this down: the formula for the equation, given point and intercept a, is

(see a paragraph below explaining why this formula is correct)

Given that a=1.28571428571429, and , we have the equation of the line:



Explanation: Why did we use formula ? Explanation goes here. We are trying to find equation y=ax+b. The value of slope (a) is already given to us. We need to find b. If a point (, ) lies on the line, it means that it satisfies the equation of the line. So, our equation holds for (, ): Here, we know a, , and , and do not know b. It is easy to find out: . So, then, the equation of the line is: .

Here's the graph:
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