Write the equation of the line passing through those two points using the point-slope formula
y - y1 = m(x - x1). Show all of your work. Remember to find the slope of the line first.
(6161) & (68,69)

Question

anonymous · Answer

find slope between two points

anonymous · Answer

Yeah I need someone to solvee it @! :P

anonymous · Answer

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

anonymous · Answer

then use one pt as x1 and y1

anonymous · Answer

slope = y2-y1/x2-x1
            69-61/68-61
             8/7

anonymous · Answer

what about point slope form?

anonymous · Answer

8/7 is the slope....m

now use either points to use point slope formula

y - y1 = m (x - x1)

i'll use points (61,61)

y - 61 = 8/7 (x - 61)

y - 61 = 8/7x - 488/7

y = 8/7 x -488/7 + 61

y = 8/7x + 915/7

anonymous · Answer

sorry i did that wrong....it's y = 8/7x -61/7

anonymous · Answer

What does the slope of the line represent within the context of your graph?

anonymous · Answer

8/7x

anonymous · Answer

and your x intercept is -61/7

anonymous · Answer

Using the equation that you found, approximately how tall is a person whose arm span is 66 inches

anonymous · Answer

y = 8/7(66) -61/7

y = 528/7 - 61/7

y = 467/7

anonymous · Answer

& if my line of best fit are the two points I mentioned in the beggniing of this equatio, then what is the arm span of a 74-inch-tall person

anonymous · Answer

?

anonymous · Answer

plug in 74

anonymous · Answer

to?

anonymous · Answer

y = 8/7x -61/7
into x

anonymous · Answer

so multipuly 8/7 by 74 and subtract 621 divided by 7

anonymous · Answer

y = 8/7(74) - 61/7

y = 592/7 - 61/7

y = 531/7