Integers
–6 + 9 =
3
x + 7 = 20
If y = 4x, find y when x=3.
12
Slope between (2,3) and (3,5).
2
10% of 50
5
–15 – (–4) =
-11
4x = 32
x=8
Evaluate f(x)=2x+1 at x=7.
15
Point with y-intercept?
(0, b)
35% → decimal
0.35
(–7)(6) =
-42
2x + 5 = 29
x=12
Identify rate of change of y = –3x + 2.
-3
Equation: slope=3, y-int=–7
y=3x-7
15 is 25% of what?
60
–72 ÷ 8 =
-9
6(x – 2) = 42
x=9
Function or not? {(1,2),(1,3),(1,4)}
Not a function
Given slope 4 and point (1,5), use point-slope form.
y-5=4(x-1)
A shirt increases from $20 to $28. What is % increase?
40%
|–14| =
14
(x/3) + 4 = 19
45
Find y-intercept of y=6x–9
-9
What makes a relationship proportional?
passes through (0,0) & constant ratio
40 is 80% of what?
50