Quizizz: Predictions using Regression Equations

Predictions Using Regression Equations

No Word Problems

1. Type the given equation into DESMOS

2. Type in the x = or y =

3. Where they intersect is your answer.

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How to make a predictions

​You will answer the question: If x = 2, then y = -5

​Given: y = 0.43x² + 0.32x - 0.08

Predict: y = 6

​Use DESMOS to type in the equation

• Type in y = 6

• Determine where the 2 figures intersect (there are 2 answers).

• Choose your answer on the next slide.

Multiple Select

Given: $$y=0.43x^2+0.32x-0.08$$

Predict: $$y=6$$

• x = -4.151

• x = 3.407

• x = 17.32

• x = -3.407

Multiple Choice

Given: $$y=3.4\cdot2.51^x$$

Predict: $$x=-1.6$$

• $$y=0$$

• $$y=0.78$$

• $$y=-0.819$$

• $$y=14.824$$

Multiple Choice

Given: $$y=12.92x+3.56$$

Predict: $$y=1$$

• $$x=16.48$$

• $$x=0$$

• $$x=-9.36$$

• $$x=-0.198$$

Multiple Choice

Given: $$y=0.24x^2-3.55x+1.22$$

Predict: $$x=7.5$$

• $$y=-11.905$$

• $$y=41.345$$

• $$y=11.681$$

• $$y=16.388$$

Multiple Choice

Given: $$y=-0.38x+2.4$$

Predict: $$x=14$$

• $$y=-30.526$$

• $$y=43.158$$

• $$y=-2.92$$

• $$y=7.72$$

Multiple Choice

Given: $$y=4\cdot0.14^x$$

Predict: $$y=19.9$$

• $$x=0.412$$

• $$x=-0.816$$

• $$x=-1.584$$

• $$x=0$$

Fill in the Blank

Given $$y=-0.3x^2-4x-1$$

If $$x=3$$ then $$y=?$$

Fill in the Blank

Given $$y=0.22x-5$$

If $$y=-10.3$$ then $$x=?$$