Here is some other info from :
3.1
( ) are for less than or greater than problems.
[ ] are for less than or equal too, or greater than or equal too problems.
4.1
Vertical line has an undefined slope.
Horizontal line has a slope of 0
Lines that start from the bottom left corner and go up on the graph have a positive slope.
Lines that start form the top left corner and go down have a negative slope.
4.4
Shading above or below the line on inequalities:
A good way to check to make sure you shaded in the right area is by plugging in a point from the shaded area and if it makes the inequality true than the area is correctly shaded.
Something to remember is if the inequality is less than or greater than then the line is dotted. And if the inequality is less than or equal too or greater than or equal too, then the line is solid.
More info-
ReplyDeleteHow to find slope-
Rise/Run
Slope = m
Slope intercept form-
y = mx +b
Standard form-
Ax + By = C
Point Slope Form-
y-y(sub 1) = m(x-x(sub 1))
The different kinds of variation-
ReplyDeleteDirect Variation-
y=kx
Inverse Variation-
y=k/x
Joint Variation-
y=kxz
Combined Variation-
B=kw/h^2
4.5
ReplyDeletef(x) = y
An example of this kind of problem is-
f(x)= -3x + 4
f(-2)
f(-2) = -3(-2) + 4
f(-2) = 6 +4
f(-2) = 10
Some more on slope-
ReplyDeletey=mx+b
m=slope
b= y-intercept
Graphing-
-you start by marking the y intercept on the graph.
-Next you use the slope to know how far up and over you go on the graph (rise/run)