Brett earned scores of 98,100,65,78,98,35,100,45 and 50 on his reading tests. What is the mean of bretts scores

The mean of Brett's scores are 74.33.

Step-by-step explanation:

The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.

- (669, in our case) SUM / COUNT of units, (this case it is 9)

MATH:

SUM = 98 + 100 + 65 + 78 + 98 + 35 + 100 +45 + 50

SUM = 669

COUNT = 98,100,65,78,98,35,100,45,50 - How many numbers are there total?

COUNT = 9

          SUM

  - SUM over COUNT

       COUNT

SUM / COUNT = ?

669 / 9 = ?

= 74.33

21

step-by-step explanation:

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4