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How does the dependent variable,y, change when the independent variable,x, changes.
y=8x
| x | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|
| Pattern | 2( 8) | 3( 8) | 4( 8) | 5( 8) | 6( 8) |
| y | 16 | 24 | 32 | 40 | 48 |
Looking at our table, we see that we get the value of y when we multiply the value of the variable x by 8. Now we want to write an equation to describe this relationship. On the one side of the equation we will have the value of y and on the other side we will have the value of x multiplied by 8. 8x =y y = 8x The equation that describes the relationship between y and x is y=8x.