Answer:
Slope = 3/7
y - intercept: y = -3
x - intercept x = 7
Step-by-step explanation:
You have to cimplify the equation in terms of y
-3x +7y= -21
7y= 3x-21
y = 3/7x - 3
SLOPE: It is whatever x is mutlipliedby
slope would be 3/7
Y intercept: you need to plug in x=0
y = 3/7(0) - 3
Zero multipled by anything is zero so you are left with
y = -3
X intercept: plug in y = 0
0 = 3/7x - 3
Move the -3 to the other side
3 = 3/7x
Multiply by the reciprocal 7/3
x = 7/3 * 3
x = 21/3
x = 7
