How do you solve a system of linear equations by graphing?
2007-09-27 09:54:27 · 4 answers · asked by DoWHATiDO 3 in Science & Mathematics ➔ Mathematics
First, you have to make sure your equatiosn are in slope-intercept form, y=mx+b. M is your slope. Make it into a fraction if its not already. The numerator is how many you go up, and the dominator is how many you go down on the graph. Your starting point is where the b is. What ever number B is, is your y-intercept. If b=4, then plot a point on 0, 4, and then plot the other points according to your slope. Do that for both equations and then find the point where both the lines meet. The coordinates of that point is your solution.
2007-09-27 10:04:56 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Graph the equations (I'm assuming there are two) by putting them in the form of y=mx+b, with m being the slope and b being the y-intercept. Find the point on the graph where the two lines intersect. If you are solving for y, then the y-coordinate of that point is your answer. If you are solving for x, then the x-coordinate is your answer.
2007-09-27 17:02:22 · answer #2 · answered by LizzyLee 2 · 0⤊ 0⤋
If you graph the linear equations, and the lines intersect, the intersection is the solution.
2007-09-27 17:00:48 · answer #3 · answered by cattbarf 7 · 0⤊ 0⤋
you graph it into the slope intercept form, and search for the zeroes of the graph. the zero's are where the line intercept the y and x axis, and where the solutions are.
2007-09-27 16:57:59 · answer #4 · answered by peteryoung144 6 · 0⤊ 0⤋