Writing some equations out might help!
1) You know that a is 4/5 of b. This can be written as:

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To find what b is equal to, multiply both sides by 5/4:

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A is 5/4 B.
2) You know that a is 1/5 smaller than b. This can be written as:

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To find b, just add 1/5 to both sides:

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B is 1/5 bigger than a.
Answer:
Since it's a horizontal line the slope would be 0
Step-by-step explanation:
Horizontal Lines A horizontal line is a line whose equation is of the form =, where is a real number. All points that lie on the line have a -coordinate of . The slope of any horizontal line is zero, 0.
If both triangles ABE = CBD then <C = <A
Hope it helps.