Question

1) What is the slope of the trend line ?

2) what is the y-intercept for the trend line ? What is the real world meaning of this point?

Answer 1

slope m=0.5, y-intercept b=5, the price of a 0 page book starts off at 5 and increases 0.5 every 50 pages

Explanation:

point slope formula

`y = mx + b`

choose a point on the line, I chose (2.00,6.00)

and b is the y-intercept at (0,5)

then plug those numbers in

`6.00 = m2.00 + 5.00`

simplify & isolate the variable

`6.00 - 5.00 = m2.00 + 5.00 - 5.00`

`1 = m2`

`1 / 2 = m2 / 2`

solve for m

`0.1 = m`

the y intercept is were the line crosses the y axis.

the y axis represents cost in dollars, the x axis represents number of pages