If y varies directly as x, and y=72 when x=8 an equation that relates x and y is? and if y varies directly as x, and y=98 when x=14 an equation that relates x and y is?

a)

b)

Step-by-step explanation:

In both parts of the problem y varies directly as x. So, they have the following form:

Where k is the constant of proportionality.

Therefore, you must find k and then write the equations.

a) Solve for k:

Then, the equation is:

b)  Solve for k:

Then, the equation is:

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step-by-step explanati∵∵∴∴on:

  answer:

  write 548 as 500 + 40 + 8. multiply each addend by 5. then add the three products to get 2,740.