Which of the following is an equation of the line, in point-slope form, that passes through the points (9, 1) and (4, 16)?

The Answer is D.

Step-by-step explanation:

Note the point slope formula: *see 1st picture because I can't do underscore 1 (WHY !?)

1st) We need to know the:

1- SLOPE

2- X1 value

3- Y1 value

2nd) Finding the slope or "m" is easy. Plug into (y2-y1)/(x2-x1) *see 2nd picture for better understanding. * SO.....

(16-1)/(4-9) = -3  (this is slope or m)

3rd) Now that we have all our information (we found m and we are given x and y through (9,1) and (4,16)....we usually just choose one of the two points and plug into the equation. HOWEVER, in this case since the equation is specific for the answer choice, use the clues and we notice we are using (9,1) so plug that in....

y-1 = -3(x-9)

.....We're done here, apparently this is what I do in my free time period of procrastination.

:0 send help

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