
Properties of a straight line
Rearrange:
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
y-(9*x-14)=0
Step 1 :
Equation of a Straight Line
1.1 Solve y-9x+14 = 0
Tiger recognizes that we have here an equation of a straight line. Such an equation is usually written y=mx+b ("y=mx+c" in the UK).
"y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.
In this formula :
y tells us how far up the line goes
x tells us how far along
m is the Slope or Gradient i.e. how steep the line is
b is the Y-intercept i.e. where the line crosses the Y axis
The X and Y intercepts and the Slope are called the line properties. We shall now graph the line y-9x+14 = 0 and calculate its properties
Graph of a Straight Line :
Calculate the Y-Intercept :
Notice that when x = 0 the value of y is -14/1 so this line "cuts" the y axis at y=-14.00000
y-intercept = -14/1 = -14.00000Calculate the X-Intercept :
When y = 0 the value of x is 14/9 Our line therefore "cuts" the x axis at x= 1.55556
x-intercept = 14/9 = 1.55556Calculate the Slope :
Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is -14.000 and for x=2.000, the value of y is 4.000. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 4.000 - (-14.000) = 18.000 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)
Slope = 18.000/2.000 = 9.000Geometric figure: Straight Line
- Slope = 18.000/2.000 = 9.000
- x-intercept = 14/9 = 1.55556
- y-intercept = -14/1 = -14.00000
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Most Used Actions
\mathrm{simplify} | \mathrm{solve\:for} | \mathrm{inverse} | \mathrm{tangent} | \mathrm{line} |

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intercepts f(x)=y=-9x-14
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