Question

Draw the triangle with vertices a(1, 1), b(5, 3), c(1, 7). find the parametrization, including endpoints, and sketch to check. (enter your answers as a comma-separated list of equations. let x and y be in terms of t.)

Answer 1

Part A:

The parametric equations
`x=x_1+(x_2-x_1)t` and
`y=y_1+(y_2-y_1)t` where
`0\leq t\leq1` describes the line segment that joins the points
`(x_1,\ y_1)` and
`(x_2,\ y_2)`.

The parameterization of the line joining points A(1, 1) and B(5, 3) are given by substituting
`x_1=1,\ \ y_1=1,\ \ x_2=5,\ \ y_2=3`.

Thus, we have

x = 1 + (5 - 1)t = 1 + 4t
y = 1 + (3 - 1)t = 1 + 2t

Therefore, the parameterization of line joining points A(1, 1) and B(5, 3) are x = 1 + 4t and y = 1 + 2t.



Part B:

The parametric equations
`x=x_1+(x_2-x_1)t` and
`y=y_1+(y_2-y_1)t` where
`0\leq t\leq1` describes the line segment that joins the points
`(x_1,\ y_1)` and
`(x_2,\ y_2)`.

The parameterization of the line joining points B(5, 3) and C(1, 7) are given by substituting
`x_1=5,\ \ y_1=3,\ \ x_2=1,\ \ y_2=7`.

Thus, we have

x = 5 + (1 - 5)t = 5 - 4t
y = 3 + (7 - 3)t = 3 + 4t

Therefore, the parameterization of line joining points B(5, 3) and C(1, 7) are x = 5 - 4t and y = 3 + 4t.



Part C:

The parametric equations
`x=x_1+(x_2-x_1)t` and
`y=y_1+(y_2-y_1)t` where
`0\leq t\leq1` describes the line segment that joins the points
`(x_1,\ y_1)` and
`(x_2,\ y_2)`.

The parameterization of the line joining points C(1, 7) and A(1, 1) are given by substituting
`x_1=1,\ \ y_1=7,\ \ x_2=1,\ \ y_2=1`.

Thus, we have

x = 1 + (1 - 1)t = 1
y = 7 + (1 - 7)t = 7 - 6t

Therefore, the parameterization of line joining points A(1, 1) and B(5, 3) are x = 1 and y = 7 - 6t.