Step-by-step explanation:
<u>Step 1: Solve using the first point</u>
<em>(2, 28)</em>


<u>Step 2: Solve using the second point</u>
<em>(-1, -5)</em>


<u>Step 3: Solve using the third point</u>
<em>(4, 220)</em>


<u>Step 4: Solve using the fourth point</u>
<em>(-2, -20)</em>


<u>Step 5: Combine the first and fourth equations</u>
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<u>Step 6: Solve for c in the second equation</u>



<u>Step 7: Substitute d with the stuff we got in step 5</u>



<u>Step 8: Substitute d and c into the first equation</u>
<u />





<u>Step 9: Substitute a, b, and c into the third equation</u>





<u>Step 10: Find a using b = 2</u>



<u>Step 11: Find c using a = 3 and b = 2</u>




<u>Step 12: Find d using b = 2</u>




Answer: 