David read 69 books in a 12-month period. sarah read 54 books in the same period of time. how many more books per month did david read than sarah?

1.25

Step-by-step explanation:

69/12= 5.75

54/12= 4.50

5.75 - 4.50= 1.25

Slope: -2/3

Y Intercept: 0,-3

Step-by-step explanation:

To find the slope, use the formula (y1-y2)/(x1-x2)

(1-(-1))/(-6-(-3))

-2/3

So the slope is: -2/3

If the slope is 3/2, then the using the formula of y=mx+b, we can find the y intercept (b)

y = -2/3x + b

insert any point of x and y

-1 = -2/3(-3)+b

-1=-2+b

so b = -3

thus, the Y intercept is 0,-3

See graph attached for graph