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avanturin [10]
3 years ago
6

Is 1/2x-4 a function?

Mathematics
1 answer:
lakkis [162]3 years ago
7 0

Answer:

Yes it is

Step-by-step explanation:

Each x value is represented by exactly one y value.

You might be interested in
Solve the system of equations two ways: 3x+y=5 and x-2y=4 A) using substitution B) using elimination
Vedmedyk [2.9K]
A. solve for 1 variable
let's solve for x in 2nd equation
add 2y to both sides
x=2y+4
sub 2y+4 for x in other equation
3(2y+4)+y=5
6y+12+y=5
7y+12=5
minu12 both sides
7y=-7
divide 7
y=-1
sub back
x=2y+4
x=2(-1)+4
x=-2+4
x=2
(2,-1)


B. eliminate
eliminate y's
multiply first equation by 2 and add to first

6x+2y=10
<u>x-2y=4 +</u>
7x+0y=14

7x=14
divide by 7
x=2
sub back
x-2y=4
2-2y=4
minus 2
-2y=2
divide -2
y=-1
(2,-1)



(2,-1) is answer
5 0
3 years ago
Describe and correct the error the student made when writing the equation of the line that passes through (-8,5)
pshichka [43]

Option D (The student should have used  as the slope of the perpendicular line.) is correct.

Step-by-step explanation:

We need to identify the error that the student made in finding equation of the line that passes through (-8,5)  and is perpendicular to y = 4x + 2

The slope of the required line would me -1/m because both lines are perpendicular.

So, slope of new line will be: -1/4

because the equation of slope-intercept form is: y=mx+b where m is the slope

Now, for finding equation the student used point slope form i.e y-y_1=m(x-x_1)

where y_1 and x_1 are the points and m is the slope.

Putting values:

x_1=-8, y_1=5 and m=-1/4

y-5=-\frac{1}{4}(x-(-8))\\y-5=-\frac{1}{4}(x+8)\\y-5=-\frac{1x}{4}-2\\y=-\frac{1x}{4}-2+5\\y=-\frac{1x}{4}+3

This is the correct solution.

The student made error by using the wrong slope he used 2 instead of -1/4

in the step y-5 = 2(x-(-8))

So, Option D (The student should have used  as the slope of the perpendicular line.) is correct.

Keywords: Equation of line using Slope  

Learn more about Equation of line using Slope at:

  • brainly.com/question/4819659
  • brainly.com/question/4097107
  • brainly.com/question/1979240

#learnwithBrainly

3 0
2 years ago
Read 2 more answers
The matrix method is being used to solve the system of equations x + 2y = 4 and 3x - y = 6.
Ira Lisetskai [31]

Answer: b) multiply row 1 by -3 and add the result to row 2


Step-by-step explanation:


8 0
2 years ago
There are 100 Skittles. 94 are blue and 6 are red. If you take 5 Skittles, what’s the chance one will be red? What’s the chance
Art [367]

Answer:

6/100 +94/100

3/50 +47/50

3+47/50

7 0
3 years ago
The picture shows the graphs of the functions expressed by a formula of the following type: y = kx + b.
Mademuasel [1]

Answer:

1. k=1,  b=1

2. k=-1, b=-0.5

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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