Step-by-step explanation:
Since, y varies directly as x:

1. Selection B is the only equation satisfied by both (0, 5) and (2, -1).
2. Selection D is the only one with a slope of 5/2.
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Answer:
a . 34
b. 150
Step-by-step explanation:
in the second case firstly add the number in bracket and multiply both the number given
in 1st case first multiply
then add both the product