Expressions
number by itself
constant
f(x) = 3x + 2
Evaluate f(5)
17
Solve 6x + 4 = 9x - 5
x = 3
-4x +14 <54
x > -10
what is the y intercept of y = 3x - 6
6
a letter that takes the place of a number
variable
g(t) = 5t^2 - 4t
Evaluate g (1)
1
5(2x + 3) = 45
x = 3
-2(x+2)<14
x > -9
Find the x intercept of 5x - 2y = 10
2
separated by plus and minus signs
terms
all of the y values
range
-3(x+4) = 4(x+4)
x = -4
what does it mean when a graph has a broken line
it is open / point cannot be used
is the point (2,3) a solution of 2x + y = 7
explain how you know it is / is not
yes / it is on the line
algebraic
What is the domain of (3,2) (4,3) (5,6) (7,8)
{3,4,5,7}
3x - x +2 = 4(2x - 1)
x = 1
describe the graph of x <= -6
solid line with shade to the left
how steep a line is
slope
expressions without variables
numeric
What type of relationship makes a function
one to one
-15 = 5a +12 - 2a + 6
a = -11
what does it mean when a graph is closed
the line is solid / point can be used
is the slope of the line positive or negative
- 3x + 6y = 12
how do you know