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valkas [14]
3 years ago
5

If the equation y=1/2x+2 is changed to y=3x+2, what will be true about the graph of the equation

Mathematics
2 answers:
anygoal [31]3 years ago
6 0
The first equation will go up by 2.5 and if it were changed to y=3X+2 it will go up by 8
Fynjy0 [20]3 years ago
4 0
From y=1/2x+2 to y=3x+2
A). The graph will shift up 3 units
B). The graph will shift down 3 units
C). The graph will shift left 3 units
D). The slope of the graph will be changed


y=mx+b
m=slope

compare
y=1/2x+2 and
y=3x+2
the only change is the slope from 1/2 to 3
the yintercpet did not change, therefor it does not shift left or right or up nor down


D is the answer

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If Tom Parsons traveled 232 miles in 4 hours, how many miles should he travel in 8
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464

Step-by-step explanation:

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The travel-to-work time for residents in Ventura County is unknown. Assume the population variance is 39. How large should a sam
katen-ka-za [31]

Answer:

A sample size of 128 is needed.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.93}{2} = 0.035

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.035 = 0.965, so z = 1.81

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population(square root of the variance) and n is the size of the sample.

How large should a sample be if the margin of error is 1 minute for a 93% confidence interval

We need a sample size of n, which is found when M = 1. We have that \sigma = \sqrt{39}. So

M = z*\frac{\sigma}{\sqrt{n}}

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\sqrt{n} = 1.81\sqrt{39}

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Rounding up

A sample size of 128 is needed.

7 0
3 years ago
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