Game Development Reference
In-Depth Information
Exercise Set 6.2
Determine the line's slope-intercept equation for the line containing the given pair of points.
a. (1, 4) and (3, 4)
b. (4, 5) and (0, 5)
c. (6, 2) and (4, 5)
d. (0, 3) and (5, 12)
e. (4, 3) and (2, 4)
f. (3, 7) and (4, 8)
g. (3, 5) and (1, 3)
h. (1, 2) and (3, 8)
i. (2, 2) and (1, 4)
j. (3, 6) and (4, 2)
Using Visual Formula
Among many other things, you can use Visual Formula to explore negative
slopes. You create a negative slope when you make the
m
(slope) value of the
line's slope-intercept equation negative. The equation then assumes the form
y ¼m(x) þ b
. Here are a few equations to try:
a.
y ¼
4
x þ
3
b.
y ¼
6
x þ
1
c.
y ¼
5
x þ
2
To implement equation
a
, work in the upper composition area and use the
following steps:
1. Click the Value menu item and then to position the Value field, click in the
upper equation composition area. This is the field that corresponds to the
coefficient
m
. Click in the field and then type
4.
