Question

If y = 5.7 when x = –3.99, what is y when x = –0.49?
Answer
0.34
–0.34
–0.7
0.7

Answer 1

y1 5.7 y2
-- = ------ = ------
x1 -3.99 x2

so

5.7 y2
------ = ------
-3.99 -0.49
this gives

5.7 * -0.49
---------- = y2
-3.99

y2 = 0.7

so the answer is 0.7