literal equations
Solve for r :
rt = y
r = y/t
5x + 1 = 16
x = 3
Is the graph to this equation going to be dotted or solid?
y < 4x + 2
dotted
Describe the spread of the data that has the correlation coefficient of
r = -0.96
negative and strong
solve for t:
5t - 4r = ax
t = (ax + 4r) / 5
(this is showing all of ax+4r divided by 5)
2b+8=7b–2
b=2
Where is the solution region to a system of inequalities?
Where the shading overlaps
describe the correlation for the data that has an r value of 0.03
positive and weak
solve for y:
2x +7y = 15
y = 15/2 - x
2(r+3)=5r–12
r=6
Graph this inequality y > 3x + 1
What does the y intercept represent for data that is comparing the number of goals scored by messi over time starting in 2000
the amount of goals he scored in the year 2000
Solve for s:
4/5s -r = wm
s = 5/4 (wm + r)
18n-6(-4n-6)=18+8n
n= -18/34 or -9/17
4x + 2y < 16
If we want to compare amount of hours studying, h, to how well we do on the test, t, we can use this line of regression equation t ~4h + 80, how can we predict our test score if someone studied for 4 hours?
Plug in 4 for h! t would be around 96
(12t-5)/r = w
t = (rw + 5) /12
-12= 2(2x + 4) - (7 - 3x)
x = -13/7
graph this system of inequalities:
2x + 5y < 5
y > -4x -1
what can you say about the r - value?
- it can be positive or negative depending on slope
-between -1 and 1
-the closer it is to 1 or -1 the stronger the correlation and the closer the graph is to being linear