1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
hoa [83]
3 years ago
13

The scatter plot below shows one class of Spanish students' time spent studying for their final versus the grade that they earne

d in the final. What grade would you predict for a student who studied for 105 minutes?

Mathematics
2 answers:
IgorC [24]3 years ago
8 0
<span>If you made a line of best fit, then the score would most likely be 95.</span>
sp2606 [1]3 years ago
5 0

Answer:

The predicted grads for a student who studied for 105 minutes is 94.

Step-by-step explanation:

From the given figure the scatter points are (0,55), (0,65), (15,60), (15,65), (15,80),(30,55), (30,70), (30,80), (45,75), (45,80), (45,85), (60,80), (60,90), (60,95), (75,85), (75,90), (90,85), (90,95), (90,100), (120,80), (120, 95), (120,100).

The equation of best fit line is

y=ax+b           ... (1)

where, a is slope and b is initial value.

a=\frac{\sum_{i=1}^nx_iy_i-n\overline{x}\overline{y}}{\sum_{i=1}^nx_i^2-n\overline{x}^2}

b=\overline{y}-b\overline{x}

Using graphing calculator we get,

a\approx 0.2835

b\approx 64.3775

Substitute the value of a and b in equation (1).

y=0.2835x+64.3775

Substitute x=105 in the above equation to find the predicted grads for a student who studied for 105 minutes.

y=0.2835(105)+64.3775

y=94.145

y\approx 94

Therefore the predicted grads for a student who studied for 105 minutes is 94.

You might be interested in
If sin =1/2then show that 3cos -4cos^3=0z
Katarina [22]

Step-by-step explanation:

ever coner should have a value.... for example sinA or cos$

please check the question again

7 0
3 years ago
A square garden has an area of 144ft^2 .<br>What is the length side of the garden?
Vladimir [108]
12, because 144^2/2=12
4 0
3 years ago
The sides of a rectangle are in the ratio 5 : 4. If the perimeter of the rectangle is 360 cm , find its area
djverab [1.8K]

Answer:

Step-by-step explanation:

let, the length is z

thus the ratio will be 5z : 4z

perimeter = 2 (a + b)

360 = 2 ( 5z + 4z )

180 = 9z

z = 20 cm

length = 100 cm and width = 80cm

area = length * width

area = 100*80

area = 8000cm²

4 0
2 years ago
In the equation 5x = 60, what is the next step in the equation solving sequence?
muminat

Answer:

C

Step-by-step explanation:

You have to divide both sides by the coefficient of x

7 0
3 years ago
Read 2 more answers
A spring stretches to 22 cm with a 70 g weight attached to the end. With a 105 g weight attached, it stretches to 27 cm. Which e
neonofarm [45]
Simple form of the equation y= ax+b
y= (1/7)x + 12
come from 2 equation :
22= 70 a + b
27= 105 a + b
8 0
3 years ago
Read 2 more answers
Other questions:
  • 6 + y = 20 please help meeee
    8·2 answers
  • Please i need help as soon asap y - 95 = 2(x - 35)
    13·1 answer
  • Listed below are amounts (in millions of dollars) collected from parking meters by a security company in a certain city. A large
    13·1 answer
  • Just number 23 super confused
    13·1 answer
  • Calcula la distancia que debe recorrer un teleférico, sabiendo que debe salir de la estación de servicio y llegar a la cima de l
    15·2 answers
  • Y=-1 <br> Y=2x-7 hsbdhdhhdhdjdjdjfjjfjfjffj
    6·1 answer
  • ANSWER THIS PLEASE!!​
    7·1 answer
  • A polygon is shown:
    12·2 answers
  • The pair of 13 and 64 are co prime are true or flase​
    11·1 answer
  • Including a 7% sales tax, an inn charges $167.99 per night. Find the inn's nightly cost before tax is added.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!