Formulas for 2.1, 2.3, 2.4

Distance Formula

Find the distance between two coordinate points.

Midpoint Formula

Find the point halfway between two coordinate point

How to find x and y intercepts of a function defined by y= f(x)

To find X input y = 0. To find Y input x = 0

How to determine a function

In each unique value of x there is exactly one value of y.

Vertical Line Test

Test to determine a function by drawing a vertical line that only hits one point.

Domain

set of x values in the ordered pairs

Range

set of y values in the ordered pairs

Domain rules for a denominator

exclude values of x that make the denominator of the fraction zero

Domain rules for a square root

exclude values that make the radicand negative. Let the radicand be greater than or equal to zero.

Three Linear equations

Standard Form, Slop-int. form, and Point-Slope Form

Standard Form

Ax + By = c

Slope-Int Form

Y = mx + b

Point Slope Form

Y - Y1 = M ( X - X1)

Slope of line Formula

Average Rate of Change Formula

How to solve inequalities graphically

1. Graph linear equations

2. Then create equal to, greater than, and less than statement

3. Write the solution as a domain interval notation