Algebra 1 STAAR Category 1 Review

Domain represents the x-values of the graph. Find the domain by looking at the points given and seeing which numbers they are on the x-axis.

Range represents the y-values of the graph. Find the range by looking at the points and the numbers they represent on the y-axis.

Remember equations are written as y=mx+b. Create the equation by finding the slope from rise/run and the y-intercept by looking at where it crosses the y-axis.

You can also create an equation by making a List & Spreadsheet, Data & Statistics, Menu 4, 6, 1.

To create an equation when given two points you will need to make a List & Spreadsheet, Data & Statistics, Menu 4,6,1. Don't forget to turn the fractions into decimals by typing the fraction and pressing CTRL Enter.

Remember equations are written as y=mx+b. Create the equation by finding the slope from rise/run and the y-intercept by looking at where it crosses the y-axis.

You can also create an equation by making a List & Spreadsheet, Data & Statistics, Menu 4, 6, 1.

Remember equations are written as y=mx+b. Create the equation by finding the slope from rise/run and the y-intercept by looking at where it crosses the y-axis.

You can also create an equation by making a List & Spreadsheet, Data & Statistics, Menu 4, 6, 1.

When it says the keywords directly varies or directly proportional. You can set up a proportion that looks like this:

$$\frac{y}{x}=\frac{y}{x}$$

Then solve the equation for the missing variable by using Menu 3, 1.

Remember HOY

Horizontal lines have

O zero slopes where equations are written as

Y = # it's crossing the y-axis

Remember HOY

Horizontal lines have

O zero slopes where equations are written as

Y = # it's crossing the y-axis