A line passes through (9, -9) and (10, -5)

Question

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Answer 1

I take it that you're looking for the equation of the line. The first thing we need to do is find the slope, so we use the slope formula:

m = (y₂ - y₁) / (x₂ - x₁)

m = (-5 - (-9)) / (10 - 9)

m = (-5 + 9) / 1

m = 4/1

m = 4

 

From here, we can use the point-slope formula:

y - y₁ = m(x - x₁)

It doesn't matter which point we use, so let's use the first (you can always check your answer by inputting the second):

y - (-9) = 4(x - 9)

y + 9 = 4x - 36

y = 4x - 45

Answer 2

What's the question