Cy’s Model: cy(x) = - 3x + 23

This model predicts that lizards weighing 0 pounds will be adopted in y-intercept y-units and that,
for every additional pound a lizard weighsx-variable units, y-variable will increase/decrease by rate of change y-units.

The error in the model is described by an S-value of about S y-units. I strongly agree, agree, disagree, strongly disagree that this model is a good fit considering that y-variable units in this dataset range from lowest y-value to highest y-value.

Jo’s Model: jo(x) = - 0.8x + 10.4

This model predicts that lizards weighing 0 pounds will be adopted in y-intercept y-units and that,
for every additional x-variable units, y-variable will increase/decrease by rate of change y-units.

The error in the model is described by an S-value of about S y-units. I strongly agree, agree, disagree, strongly disagree that this model is a good fit considering that y-variable units in this dataset range from lowest y-value to highest y-value.

Comparing Models

1 Is Jo’s model better or worse than Cy’s model?

2 How much more / less error do we expect in predictions made with Jo’s model than predictions made with Cy’s model?

Percent Change   =   $$\displaystyle \frac{  \text{Difference}   \text{between}   \text{the}   \text{S-values} } {\text{S-value}   \text{for}   \text{Cy’s}   \text{model}} \times 100   =  $$ $$\displaystyle \frac{\qquad}{\qquad}$$

We expect predictions made with Jo’s model to have percent more / less error than predictions made with Cy’s model!

My Model

If your teacher had you complete From Lines to Functions, write the function you defined for your model on the line below and then complete the interpretation. If your class did not define models for the lines you drew, you can skip this section.

my-model(x) =

This model predicts that lizards weighing 0 pounds will be adopted in y-intercept y-units, and that,
for every additional x-variable units, x-variable will increase/decrease by rate of change x-units.

The error in the model is described by an S-value of about S units. I strongly agree, agree, disagree, strongly disagree that this model is a good fit considering that y-variable units in this dataset range from lowest y-value to highest y-value.

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