Which of the following best describes the technique used to graph the equation, y = -2x + 8, using slope and y-intercept?
Mark a point at 8 on the y-axis, move upward 2 and right 1, mark the point and draw the line.
Mark a point at 8 on the y-axis, move downward 2 and right 1, mark the point and draw the line.
Mark a point at -2 on the y-axis, move upward 8 and right 1, mark the point and draw the line.
Mark a point at -2 on the y-axis, move downward 8 and right 1, mark the point and draw the line.

Question

Which of the following best describes the technique used to graph the equation, y = -2x + 8, using slope and y-intercept?
       Mark a point at 8 on the y-axis, move upward 2 and right 1, mark the point and draw the line.
       Mark a point at 8 on the y-axis, move downward 2 and right 1, mark the point and draw the line.
       Mark a point at -2 on the y-axis, move upward 8 and right 1, mark the point and draw the line.
       Mark a point at -2 on the y-axis, move downward 8 and right 1, mark the point and draw the line.

directrix · Answer

The line has a negative slope so the line is "falling" as you look at its graph from left to right. The slope of -2 = -2/1 which represents the change in y over the change in x.
Every time x goes up 1 unit, y's value goes down 2 units.

directrix · Answer

So which option do you think it is? @Kalim98

directrix · Answer

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