The slope of a line is given by the equation
y2 is -4. y1 is 5
x2 is 4. x1 is 1
-4 -5 / 4-1 = -9/3 = -3
The slope is -3. Now we need to find the y-intercept
y= mx +b
5= -3(1) +b
5= -3 +b
b= 8
Our equation for the line: y= -3x +8
Xx60%=48
48/60=0.8
0.8x100=80
X=80
Answer:
d. y = 4x
Step-by-step explanation:
We will use a slope-intercept equation to represent this. These equations are of the form
y = mx + b, where m is the slope and b is the y-intercept.
We can see in the graph that the line crosses the y-axis at 0; this makes 0 the y-intercept.
To find the slope, we find the rise and the run. The line rises 4 and runs 1 between points; this makes the slope 4/1 = 4.
This gives us the equation
y = 4x + 0, or y = 4x.
The correct answer is C
Approximately 95% of data falls within 2 standard deviations (±2) of the mean.