Equations Of All Kinds!!!

Today’s Goals

❏ I can write equations of lines that

have a positive or a negative
slope.

❏ I can write equations of vertical

and horizontal lines.

All the Same

Exploration

Problem 1

Suppose you wanted to graph
the equation y= -4x-1.

a. Describe the steps you would

take to draw the graph.

b. How would you check that

the graph you drew is
correct?

Problem 2

Match the following lines with
the description and write an
equation for each.

a. Slope is 0, y-intercept is 5
b. Slope is 2, y-intercept is -1
c. Slope is -2 ,y -intercept is 1
d. Slope is -½ , y-intercept is -1

On your own…

1.

Plot 5 points whose
y-coordinate is -4. What
do you notice?

2.

Which equation makes
the most sense to
represent all of the points
with the y-coordinate -4?
Explain.

x= -4

y= -4x

y= -4

x +y = -4

On your own…

3. Plot 5 points whose
x-coordinate is 3. What do
you notice?

4. Which equation makes
the most sense to
represent all of the points
with the x- coordinate 3?
Explain.

x= 3

y= 3x

y= 3

x +y = 3

On your own…
Use the applet or google
draw tools to graph one of
the following lines:

x= -2 or y= 5

Be prepared to share