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1 answer:
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Answer:
B
Step-by-step explanation:
- First find the perdendicular slope (flip and change sign) : m= -
- Then set up your equation using the given ordered paired to find your y-intersept: -1 = -
(5) + b
- Caluclate the product: -1 = -
+ b
- Move the variable to the left-hand side and change its sign : -b - 1 = -
- Calculate the sum: -b = -
- Change the sign : b=
- Use the slope and y-intersept to creat the equation: y = -
Answer:
The value of y when x = 90
y = 22.5
Step-by-step explanation:
<u><em>Step(i)</em></u>:-
The value of y is directly proportional to the value of x.
Y∝ X
y = k x
If y = 45 when x = 180
45 = k ( 180)
<u><em>Step(ii):</em></u>-
The value of y when x = 90
y = 0.25 × 90 = 22.5
y = 22.5