Given (1, 4) and (5, 6)
calculate 8 items:
Slope (m) = | y2 - y1 |
x2 - x1 |
Slope (m) = | 6 - 4 |
5 - 1 |
Slope (m) = | 2 |
4 |
Reduce numerator and denominator by the (GCF) of 2
Slope = (2/2)/(4/2)
Slope = | 1 |
2 |
y - y1 = m(x - x1)
y - 4 = 1/2(x - 1)
Standard equation of a line is y = mx + b
where m is our slope
x and y are points on the line
b is a constant.
Rearrange the equation to solve for b
we get b = y - mx.
Use (1, 4) and the slope (m) = 1/2
b = 4 - (1/2 * 1)
b = 4 - (1/2)
b = | 8 |
2 |
- |
1 |
2 |
b = | 7 |
2 |
This fraction is not reduced. Using our GCF Calculator, we see that the top and bottom of the fraction can be reduced by 7
Our reduced fraction is:
1 | |
0.28571428571429 |
y = 1/2x + 1/0.28571428571429
D = Square Root((x2 - x1)2 + (y2 - y1)2)
D = Square Root((5 - 1)2 + (6 - 4)2)
D = Square Root((42 + 22))
D = √(16 + 4)
D = √20
D = 4.4721
Midpoint = |
x2 + x1 |
2 |
, |
y2 + y1 |
2 |
Midpoint = | |
1 + 5 |
2 |
, |
4 + 6 |
2 |
Midpoint = | |
6 |
2 |
, |
10 |
2 |
Midpoint = (3, 5)
Plot a 3rd point (5,4)
Our first triangle side = 5 - 1 = 4
Our second triangle side = 6 - 4 = 2
Using the slope we calculated
Tan(Angle1) = 0.5
Angle1 = Atan(0.5)
Angle1 = 26.5651°
Since we have a right triangle
We only have 90° left
Angle2 = 90 - 26.5651° = 63.4349
The y intercept is found by
Setting x = 0 in y = 1/2x + 1/0.28571428571429
y = 1/2(0) + 1/0.28571428571429
y = 1/0.28571428571429
Parametric equations are written as
(x,y) = (x0,y0) + t(b,-a)
(x,y) = (1,4) + t(5 - 1,6 - 4)
(x,y) = (1,4) + t(4,2)
x = 1 + 4t
y = 4 + 2t
x - x0 | |
z |
y - y0 |
b |
x - 1 | |
4 |
y - 4 |
2 |