Question

Which type of lines pass through points (1,2), (9, 9) and (-12,-11), (-4,-4) on a grid?

Answer 1

See a solution process below:

Explanation:

First, we can plot the first two points in the problem and draw a line through them:

graph{((x-1)^2+(y-2)^2-0.25)((x-9)^2+(y-9)^2-0.25)(8y-7x-9) = 0 [-30, 30, -15, 15]}

Next, we can plot the second two points in the problem and draw a line through them:

graph{((x+12)^2+(y+11)^2-0.25)((x+4)^2+(y+4)^2-0.25)(8y-7x-9)(8y-7x+4) = 0 [-30, 30, -15, 15]}

From the graph, these two lines appear to be parallel lines.