Answer:
800 different sets of digits
30/100× 250 = 70
250 - 70 = 180
agree, he'll save up to $70 and get the ipod at price $180
The point (2, 5) is not on the curve; probably you meant to say (2, -5)?
Consider an arbitrary point Q on the curve to the right of P,
, where
. The slope of the secant line through P and Q is given by the difference quotient,

where we are allowed to simplify because
.
Then the equation of the secant line is

Taking the limit as
, we have

so the slope of the line tangent to the curve at P as slope 2.
- - -
We can verify this with differentiation. Taking the derivative, we get

and at
, we get a slope of
, as expected.
Answer:
a=1
Step-by-step explanation:
If it has a slope f 1 the points should be matching.