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See below

Step-by-step explanation:

Problem 9:

Yes it is proportional because the vehicle is moving at a constant speed of 41 mph (as 92/2=41). So if you don't drive, your speed is 0 mph which is accurate in regards to the graph.

Problem 10:

No it is not because due to the y-intercept not being 0, y doesn't vary directly with x. However, the slope remains constant, but it's not the same thing as proportional

step-by-step explanation:

given expression is .

now we need to simplify the given expression .

we know that square root is equivalent to the power 1/2. so that means we can take half of the exponents to get the square root of given expression.

expanding that will give a very very large number so let's keep answer in exponent form.