Expressions
The sum of four and a number
4 + n
42 + 2 - 8
10
Find the slope.
(1, 3) (3, 1)
-1
x - 2 = 8
x = 10
What is the slope formula?
m = y2 - y1/ x2 - x1
The product of eight and x
8x
3(x + 8)
3x +24
(5, 1) (-1, 3)
-1/3
5x = 35
x = 7
What is the direct variation formula?
y = mx or y = kx
Write a verbal expression for:
3x - 2
*Answers vary
The product of three and x minus two
Three times x minus two
-6w + 5w
-1w
Name the parallel slope.
m = 9
9
|a - 5| = 1
a = 6 and a =4
What is the slope intercept form?
y = mx + b
A number decreased by 7
n - 7
2(x +9) -5x
-3x +18
Name the perpendicular slope.
m = 7
-1/7
x +9 > 3
x > -6
What is the point slope form?
y - y1 = m(x - x1)
The quotient of a number and 2 increased by 5
n/2 + 5
2x +6(2x +7)
14x + 42
Name the parallel and perpendicular slope.
m = 10
parallel: 10
perpendicular: -1/10
2x - 6 = 12
x = 9
Write in y = mx + b
y - 2 = 3(x - 4)
y = 3x -10