The slope-intercept form:
[tex]y=mx+b[/tex]
m - slope
b - y-intercept → (0, b)
Read two points from graph
y-intercept: (0, -3) → b= -3
x-intercept: (-2, 0).
The formula of a slope:
[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]
Substitute:
[tex]m=\dfrac{0-(-3)}{-2-0}=\dfrac{3}{-2}=-\dfrac{3}{2}[/tex]
Therefore we have the equation of a line in slope-intercept form:
[tex]y=-\dfrac{3}{2}x-3[/tex]
Convert to the standard form [tex]Ax+By=C[/tex]
[tex]y=-\dfrac{3}{2}x-3[/tex] multiply both sides by 2
[tex]2y=-3x-6[/tex] add 3x to both sides
[tex]3x+2y=-6[/tex]
Answer: 3x + 2y = -6
