Astudy was conducted to determine if there was a difference in the humor content in british and american trade magazine advertisements. in an independent random sample of 270 american trade magazine advertisements, 56 were humorous. an independent random sample of 203 british trade magazines contained 52 humorous ads. does this data provide evidence at the .05 significance level that there is a difference in the proportion of humorous ads in british versus american trade magazines.

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step-by-step explanation:

the orientation of the parabolas can easily be found by analysing the power of x and y and their signs. if x is squared , parabola opens up and also if its coefficient is negative it opens down. if y is squared , the parabola opens right and also if its coefficient is negative it opens left. however in order to do the above analysis our equation must be in standard form .

our parabola is

which is not standard form of any parabola . hence we square on both hand side and convert it into standard form.

hence we see that x is squared and its coefficient is non negative . there for it opens up.

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c