If A is perpendicular to B and B is perpendicular to C, what

I need help graphing the right points so please send a picture of the graph also

kotykmax [81]

Answer:

you cant send pictures unless created on a graphing website but ill try to help. you first have to simplify y, and if you could comment a clearer equation that would be nice because your equation is confusing(cant tell if its all together

7 0

4 years ago

Giving 50 points it's grade 9 algebra 1 help please

Annette [7]

Answer:

(a) y = 34.27 + 7.79x

(b) r = 0.98 (nearest hundredth)

(c) strong, positive correlation - as the students spends more time studying, their test scores increase.

Step-by-step explanation:

Correlation measures how closely two variables are linked.

If two variables are correlated, you can draw a line of best fit on the scatter plot.

Explanatory (independent) variable is drawn on the x-axis
Response (dependent) variable is drawn on the y-axis.

Linear regression is a method for finding the equation of a line of best fit on a scatter plot.

The regression line of y on x is: y = a + bx

where a = y-intercept and b = gradient

If b is positive, the variables are positively correlated.

If b is negative, the variables are negatively correlated.

Inputting the data from the table into a calculator and using the statistical function:

a = 34.27272727

b = 7.792207792

Therefore, the linear equation is:

y = 34.27 + 7.79x

The correlation coefficient is the Product Moment Correlation Coefficient (r) and measures the strength of the linear correlation between two variables.

Again, inputting the data from the table into a calculator and using the statistical function:

r = 0.9815741571

⇒ r = 0.98 (nearest hundredth)

The r value is always between +1 and -1. The closer it is to +1 or -1, the stronger the correlation between the two variables.

Values close to +1 mean a strong, positive correlation.
Values close to -1 mean a strong, negative correlation.
Values close to zero mean a weak correlation.

Therefore, as r is very close to +1, the correlation coefficient suggests a strong, positive correlation. In the context of the problem, this suggests that as the students spends more time studying, their test scores increase.

8 0

2 years ago

78 students are separated into groups of 8 for a field trip how many groups are there there are many students from a smaller gro

mixas84 [53]

Nine groups of 8 students and one group of 6 students. 9 x 8 = 72. 78 - 72 = 6.

5 0

3 years ago

Y+3/5<br><img src="https://tex.z-dn.net/?f=%20%5Cgeqslant%20" id="TexFormula1" title=" \geqslant " alt=" \geqslant " align="absm

kodGreya [7K]

Y+2/3 -2 y+3/5 what do u want?

3 0

3 years ago

Francine Flicka found a bargain when she bought a lawn mower. She paid the store's clerk three $20 bills and received him $7.45

adoni [48]

Answer:

$48.97

Step-by-step explanation:

Let p represent the marked price of the mower. Then the price with tax is ...

with tax = p + 7.3%×p = 1.073p

The amount Flicka paid is the amount tendered less the change she received, so is ...

3×$20 - 7.45 = with tax = 1.073p

To find p, we can divide by its coefficient:

(3 × $20 - 7.45)/1.073 = p ≈ $48.97

The selling price before taxes was $48.97.

_____

<em>Comment on the problem</em>

If you check the answer, you find the amount with tax is ...

$48.97 × 1.073 ≈ $52.54481 ≈ $52.54

so the change Flicka would have received would have been $7.46, not $7.45. If the price were $48.98, then the change would have been $7.44. There is no price at which the mower can be marked that will make the total with tax come to $52.55. There is no solution to this problem.

5 0

4 years ago

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