Heather was asked to graph 3x - y = -4 by using slope and y-intercept. her graph is shown.

which choice supports the graph that she has drawn?
a) the slope is positive 3 and the y-intercept is (0,4).
b) the slope is negative 3 and the y-intercept is (0,4).
c) the slope is positive 3 and the y-intercept is (0,-4).
d) the slope is negative 3 and the y-intercept is (0,-4).

false

step-by-step explanation:

4y - 6 + 4y^2 - 9

before simplifying this contains 4 terms

after simplifying

4y -15 + 4y^2

it contains 3 terms

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