It is 8
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y = -2x - 8
x-intercept is at y=0y=x^2+6x+80=x^2+6x+80=(x+4)(x+2)x=-4,-2x-intercepts are at (4,0) and (-2,0)
6x+3y = 8 3y = -6x+8 y = -3x+8/3 The slope of the line is -3
The quadratic expression x2+6x+8 when factorised equals (x+2)(x+4)
6x+8y = 12 8y = -6x+12 Divide all terms by 8:- y = -0.75x+1.5 which is now in slope intercept form