So you already know the difference between the new number and original number, so all you have to do now is plug it in to this: Percentage Change=Difference/Original Number x100. So 17.99/257=.07x100 which equals 7%. So B is the correct answer.
If the line is perpendicular to x = 4, then that means the answer should be y = some number
and since we have the equation going through point (5,7), we look at the y-value since our equation is y=some number and replace the y-value into that equation.
So the correct answer is C. y = 7
Hope that helps :)
3/15=2/n
Multiply up and down
3*n, 15*2= 3n and 30
Divide by 3 for 3n and 30
3n/3=30/3
n=10
Check answer by using substitution method
3/15=2/n
3/15=2/10
Reduce by 3 for 3/15, Reduce by 2 for 2/10
3/15=1/5
2/10= 1/5
Answer is n=10- G
<h3>
Answer: Choice D</h3>
This shows a list of points where the x coordinate does not repeat. This means that any given x input leads to exactly one y output.
Something like choice A has x = 6 repeated; showing that x = 6 leads to both y = 11 and y = -9 at the same time. So this is why choice A is not a function. Choice B has x = 1 repeat, so it's not a function either. Choice C has x = 19 repeated, so it's not a function.
As a visual tool, you can use the vertical line test to check each set of points. If you are able to draw a single vertical line through more than one point on the graph, then it is not a function.
