Question 555235: how do u solve
y=5x-10
y=3x+8
Answer by kkasko(46)   (Show Source):
You can put this solution on YOUR website! how do u solve
y=5x-10
y=3x+8
This is solved by graphing as it is already in y=mx+b form.
The point you should start at for the first equation is (0,-10) which is on the y-axis and from that point go up 5 and right 1. And then from (0,-10) go down 5 and left 1.
The point you should start at for the second equation is (0,8) also on the y axis from that point go up 3 and right 1. Then from that point you should go down 3 and left 1. The points should now connect and that is your solution.
You could also do this problem with a graphing calculator by putting both equations into y=. Equation one in Y1 and equation 2 in Y 2. Then enter correct window settings which are { -10,10,1,-60,40,1,1}. Or you could press zoom fit which shows where they intersect on the screen. And changes the window settings. It's still good to know how to change window settings manually though. As zoom fit does not show an accurate graph. Then press 2nd calc. Intersect. Enter, enter, enter.
The equations intersect at (9,35)
|
|
|
