SOLUTION: Tricia can type 70 words in 30 seconds, and 100 words in 100 seconds. What is the equation that predicts the number of words Tricia can type in a certain number of seconds? Let X b

Algebra ->  Linear-equations -> SOLUTION: Tricia can type 70 words in 30 seconds, and 100 words in 100 seconds. What is the equation that predicts the number of words Tricia can type in a certain number of seconds? Let X b      Log On


   

Question 1099904: Tricia can type 70 words in 30 seconds, and 100 words in 100 seconds. What is the equation that predicts the number of words Tricia can type in a certain number of seconds? Let X be the number of seconds and Y be the number of words Tricia types
Answer by josgarithmetic(39631) About Me  (Show Source):
You can put this solution on YOUR website!
(30,70) and (100,100).

If a line,
y-70=%28%28100-70%29%2F%28100-30%29%29%28x-30%29

y-70=%283%2F7%29%28x-30%29

y=%283%2F7%29x-%283%2F7%29%2A30%2B70

y=%283%2F7%29x-90%2F30%2B2100%2F30

y=%283%2F7%29x%2B2010%2F30

highlight%28y=%283%2F7%29x%2B67%29