Math 8th Grade
posted by Please help me .
I would greatly appreciate it if someone would please be kind enough to take the time and show me how to work these problems. Thank you very much
Solve by finding y and graph using the slope and y-intercept:
3x-y=1(My answer -y=3x+1)which is wrong
could not graph it.
x-y=3 (My Answer y=x-3) which is wrong
could not graph it
3x-8=y(My Answer -6x+2y=-16)
graph (0,8) (1,5) which is wrong
Use the point-slope from of an equation to write the following in slope intercept form:
m= 3/8 point: (3,5) (I did not try this one at all)
3x-y = 1
y = 3x - 1
x-y = 3
y = x - 3
3x-8 = y
y = 3x - 8
in each case, y=mx+b where m is the slope and b is the y-intercept.
now that you have the y-intercept, the x-intercept is where y=0
On the first one,
y = 3x-1
0 = 3x-1
x = 1/3
so, plot (0,-1) and (1/3,0) and draw a line between them.
Similarly for the others. just get the x-intercept and draw a line between the intercepts.