Question

graph the equation and identify the y-concept x+5y=15

Answer 1

put into y= mx + b form, where m is slope and b is y-intercept:
y = -1/5x + 3

So it's a line with slope -1/5 that crosses the y axis at (0,3).

Answer 2

And it's "y-intercept," not "y-concept."

Answer 3

y=-x+15/5