Assignments

Below a number of assignments about lines, their slopes, when they are in parallel, how you can calculate the formula of a line through a given point and slope or through two given points.

1. Draw the line:

l: y=x+2

and calculate the slope and the exact intersection point of the line with the Y-as.

Solution

2. Draw the line:

l: y=-2x+4

and calculate the slope and the exact intersection point of the line with the Y-as.

Solution

3. Draw the line:

l: y=-2

and calculate the slope and the exact intersection point of the line with the Y-as.

Solution

4. Draw the line of the following linear functions:

l: y=2x+3
m: y=-x-1

and calculate their intersection point.

Solution

5. Draw the lines of the following linear functions:

l: y=-x+3
m: y=-x-1

and calculate their intersection point.

Solution

6. The line l through the point A(2,1) with slope -2 intersects the line:

m: y=x+3

in point S.
Calculate the coordinates of S.

Solution

7. The line l goes through the points A(2,1) and B(0,3) and intersects the line:

m: y=2x

in point S.
Calculate the coordinates of S.

Solution

8. The line l goes through the points A(1,3) and B(5,3) and intersects the line:

m: y=-x+5

in the point S.
Calculate the coordinates of S.

Solution

9. Given the following two linear equations with two unknown variables x en y:

2x-y=-1
x+2y=7

Answer the following questions.

  1. The equations represent lines. Calculate their slopes.
  2. How can you calculate the coordinates of their intersection point S?

Solution

10. The line l goes through the points P(1,2) and Q(-1,-1). For which value of r is the line:

m: y=rx-3

parallel to l?

Solution

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