1. whats the slope of the line that passes through the points (9,1) and (-2,8)?

Answer 1

The formula to find the slope of the line is y2-y1/x2-x1 It's like rise(y) over run(x). In your problem, the solution would be:
(8-1)/(-2-9) = 7/-11

Answer 2

The equation of a line is Y = mX + b the place m is the slope and b is the y fee of the factor the place the line crosses the y-axis. you realize that the slope is two, so replace m with 2 and you gets: Y = 2X + b the line passes in the path of the factor (a million,2) so y=2 each and every time x=a million you could replace x with a million and y with 2 and then clean up for b So now the equation sounds like: 2 = 2(a million) + b which could be simplified to: 2 = 2 + b Now subtract 2 from the two aspects of the equation and get: 0 = b So now which you solved for m and b you could write the equation: Y = 2X + 0 or basically Y = 2X

Answer 3

Slope is the y-step divided by the x-step (rise divided by run)

Hence

(8-1) / (-2 - 9)

or 7/-11

(or -7/11)

Answer 4

-3.5