unit 1
What is 3x+4x?
7x
solve: x+5=12
x=7
Solve: x>6
Any number greater than 6
A set of x- and y-values
What does slope measure?
Steepness of a line
Simplify: 5(2x-1)
10x-5
solve: 2x=18
x=9
Solve: x+3<8
x<5
Does the relation pass the vertical line test if one x-value has two y-values?
No
Fine the slope between (1,2) and (3,6)
2
Evaluate 3x+2 when x+4
14
solve: 3x-4=11
x=5
Solve: 2x>10
x>5
What is the y-intercept of y=x+4?
4
Whats the slope-intecept form?
Simplify: 2x +5-x+3
x+8
Solve: 5x+7=22
x=3
What happens to the inequality sign when dividing by a negative?
it flips
what is the domain?
All x-values
What type of line has zero slope?
Horizontal line
Use distributive property: 4(x+6)
4x+24
Solve: 4(x-2)=20
x+7
Solve: -3x<12
x>-4
What is the range?
All the y-value
Write the equation of a line with slope 2 and y-intercept 3.
y=2x+3