Write an equation of a line that has a y-intercept of -1 and is perpendicular to the graph if 2-2y=-5x

y=-0.4x-1

Step-by-step explanation:

lets write the equation of the perpendicular graph: y=2.5x+1

Two graphs are perpendicular if the multiplication of their slopes are equal to -1.

So we can say that: 2.5*x=-1 → x=-0.4

Now we will find the needed graph with the help of the slope and the point (0,-1):

y-(-1)=-0.4*(x-0) → y+1=-0.4x → y=-0.4x-1

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step-by-step explanation: