If we are comparing time studying and your grade on a graph which do you think most depends on the other?

Question of the day

Dependent vs. independent variables

• In any rate or ratio there are two things being compared

• One of their values depends on the others value

• Examples

• The number of items you buy depends on the price

• Your paycheck depends on the number of hours you works

Dependent vs. independent

• Describe which of these are dependent and which are independent

• Time running and distance ran

• Gas in car and distance possible

• Money spent and songs purchased

Go over lesson 8 problem set

• Hand in yesterday's assignment

Lesson 9 notes

Constant of proportionality is found by =k

divide dependent variable by independent variable

find unit rate

whatever you want to be one goes on bottom

Lesson 9 notes

• Dependent variable (x value, usually x axis) the one that depends or is effected by the other value

• Independent variable (y value, usually y axis) the one that effect the other value.

Lesson 9

• Example #1 and 2

• All of problem set on separate sheet of paper

Exit ticket

• Write answer for #1 from exit ticket on bell ringer worksheet