20 question quiz need help

1. Find the slope of the line that goes through the given points.
    (-8, 8), (-5, 2)

2. Determine whether the equation defines y as a function of x.
    x + y = 9

 3. Determine whether the equation defines y as a function of x.
     x = y2

 4. Determine whether the equation defines y as a function of x.
     x2 + y2 = 1

  5. Determine whether the relation is a function.
      {(-2, -7), (3, -5), (6, -4), (9, -6), (10, -1)}

 6. Find the slope of the line that goes through the given points.
      (-7, 6), (-7, -9)

 7. Determine whether the relation is a function.

    {(1, -3), (1, 1), (6, -8), (9, -3), (11, -3)}

 8. Evaluate the function at the given value of the independent variable and simplify.
     f(x) = -3x – 8; f(-2)

  9. Determine whether the relation is a function.
         {(-5, -4), (-2, 9), (-1, -2), (-1, 7)}

 10.  Find the slope of the line that goes through the given points.

         (-2, -6), (-9, -17)

11. answered

 12. Find the slope of the line that goes through the given points.
       (-3, -7), (9, -7)

  13.  Determine whether the relation is a function.

           {(-7, -1), (-7, 2), (-1, 8), (3, 3), (10, -7)}

 
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