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Brut [27]
4 years ago
8

1. Which of the following does not describe slope? A. A line joining points. B. A constant rate of change. C. A proportional rel

ationship D. A measure of change. 2. What is the slope of the line shown in the graph? A coordinate plane is shown with points graphed at −2 comma 2 and 0 comma 1. The points are joined by a line −2 −1 −1 over 2 1 over 2.
Mathematics
2 answers:
trasher [3.6K]4 years ago
7 0
1) A
A slope, or gradient, is used to define a rate of change or proportional relationship
2) Using the given points, the slope can be calculated:
slope = (y₂ - y₁)/(x₂ -x₁)
= (1 - 2)/(0 - (-2))
= -1/2
Anvisha [2.4K]4 years ago
3 0

Answer:

Part 1) A line joining points Option A

Part 2) m=-\frac{1}{2}

Step-by-step explanation:

Part 1)

we know that

case A) A line joining points -------> does not describe slope

case B) A constant rate of change-----> is used to describe slope

case C) A proportional relationship -----> is used to describe slope

case D) A measure of change -----> is used to describe slope

Part 2) we know that

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

we have

A(-2,2)\ B(0,1)

Substitute the values

m=\frac{1-2}{0+2}

m=-\frac{1}{2}

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bulgar [2K]

Answer:

\the second and third one

6 0
3 years ago
What is the value of X^2-4y/2 if x=4 and y=-3
Dominik [7]

To solve this, we just need to plug in the numbers.

4^2-4*3/2

Now solve!

4^2-4*3/2

16-4*9

16-36

-20

There's your answer!


Any questions?


3 0
4 years ago
Find area of a quadrant of a circle whose radius is 3.5 cm.
kati45 [8]

Area of full circle= πr^2

Area of a quadrant= πr^2/4

=(3.5)^2π/4

=12.25π/4

=3.06πcm squared.

4 0
3 years ago
Find the measure of an angle and its complement if one angle measures 24 degrees more than the other.
Vera_Pavlovna [14]

Complementary angles = 90

x+y =90

y=x+24

substitute this in to the equation

x+x+24=90

2x+24=90

subtract 24 from each side

2x = 66

divide by 2

x=33

y = 33+24

y=57

Answer: 33, 57

6 0
3 years ago
In a population of similar households, suppose the weekly supermarket expense for a typical household is normally distributed wi
Rina8888 [55]

Answer:

P(Y ≥ 15) = 0.763

Step-by-step explanation:

Given that:

Mean =135

standard deviation = 12

sample size n  = 50

sample mean \overline x = 140

Suppose X is the random variable that follows a normal distribution which represents the weekly supermarket expenses

Then,

X \sim N ( \mu \sigma)

The probability that X is greater than 140 is :

P(X>140) = 1 - P(X ≤ 140)

P(X>140) = 1 - P( \dfrac{X-\mu}{\sigma} \leq \dfrac{140-135}{12})

P(X>140) = 1 - P( \dfrac{X-\mu}{\sigma} \leq \dfrac{5}{12})

P(X>140) = 1 - P( Z\leq0.42)

From z tables,

P(X>140) = 1 - 0.6628

P(X>140) = 0.3372

Similarly, let consider Y to be the variable that follows a binomial distribution of the no of household whose expense is greater than $140

Then;

Y \sim Binomial (np)

Y \sim Binomial (50,0.3372)

∴

P(Y ≥ 15) = 1- P(Y< 15)

P(Y ≥ 15) = 1 - ( P(Y=0) + P(Y=1) + P(Y=2) + ... + P(Y=14) )

P(Y \geq 15) = 1 - \begin {pmatrix} ^{50}_0 \end {pmatrix} (0.3372)^0 (1-0,3372)^{50} + \begin {pmatrix} ^{50}_1 \end {pmatrix} (0.3372)^1 (1-0,3372)^{49}  + \begin {pmatrix} ^{50}_2 \end {pmatrix} (0.3372)^2 (1-0,3372)^{48} +...  + \begin {pmatrix} ^{50}_{50{ \end {pmatrix} (0.3372)^{50} (1-0,3372)^{0}

P(Y ≥ 15) = 0.763

7 0
3 years ago
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