Distance, Midpoint and Slope Formulas

How is the distance formula correctly written:

What is the slope formula?

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Which of the following is the correct midpoint formula given two endpoints (x₁, y₁) and (x₂, y₂)?

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Find the distance.

• 9.7
• 10.7
• 11.7
• 12.7

What's the distance between (-3,4) and (-3, -10)?

• 14
• -14
• 6
• -6

What's the distance between (0,0) and (3,4)

• 7
• 49
• 5
• 25

What's the midpoint of the the line-segment starting at (2,4) and ending at (2, 8)

• (-2,-6)
• (2, 12)
• (4, 12)
• (2, 6)

What's the midpoint of the the line-segment starting at (4, 5) and ending at (-12, 5)

• (-4, 5)
• (-8, 5)
• ( 8, 2.5)
• (8, 5)

Find the slope of the line that passes through:
(6,7) and (4,2)

• 2/5
• -5/2
• 5/2
• -1/2

Find the slope given the points (-2,-9) and (-1,-3). 

• 4
• -1/6
• -6
• 6