Chapter 5
Chapter 5 (p. 282)
Algebra 1 Flashcards
The constant k in direct and inverse
variation equations.
y 5x
constant of variation
constant of variation
Chapter 5 (p. 282)
A linear relationship between two
variables, x and y, that can be written in
the form y kx, where k is a nonzero
constant.
direct variation
Y
X
y 2x
Chapter 5 (p. 256)
An equation that can be written in the
form Ax By C where A, B, and C
are constants and A and B are not
both 0.
linear equation
2x 3y 6
Chapter 5 (p. 256)
A function that can be written in
the form y mx b, where x is the
independent variable and m and b are
real numbers. Its graph is a line.
y 2x 1
linear function
Y
X
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Holt Algebra 1
Chapter 5
Algebra 1 Flashcards
Chapter 5 (p. 304)
Lines in the same plane that do not
intersect.
parallel lines
R
S
Chapter 5 (p. 306)
Lines that intersect at 90
angles.
N
perpendicular lines
Chapter 5 (p. 310)
rate of change
Chapter 5 (p. 272)
M
A ratio that compares the amount of
change in a dependent variable to the
amount of change in an independent
variable.
The cost of mailing a letter increased
from 22 cents in 1985 to 25 cents in
1988. The rate of change was
change
in cost
25 ⴚ 22
3ⴝ
_____________
ⴝ ___________
ⴝ __
1988 ⴚ 1985
3
change in year
1 cent per year.
A measure of the steepness of a line. If
(x 1, y 1) and (x 2, y 2) are any two points
on the line, the slope of the line,
y2 y1
represented by m, is m = _______
x 2 x 1.
slope
_
y - y1
m = x2 - x
1
2
Y
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216
X
-1 - 2
=_
-2 - 2
3
=_
4
Holt Algebra 1