Write an equation in slope-intercept form of a line with a slope of 2 and a y-intercept of -3.

y=2x-3

Step-by-step explanation:

y=mx+b

y=2x+b

y=2x+3

STOP

the y intercept is a negitive not a positive!

y=2x-3

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18