Posted by **NY-Calc** on Monday, March 7, 2011 at 12:45pm.

Let f(x) = 3x^2 - 2x + 1

a) write an equation of the line going through the points (1, f(1)), and (2, f(2)).

b) Find a point on the graph of f where the tangent line to the graph has the same slope as the line in part (a). Write the equation of the tangent line at that point.

I got the answer to part A. For part b, I'm confused...isn't the slope of the tangent line -1/slope of normal line?

for part a) i got y = 7x -5

- College Calculus -
**bobpursley**, Monday, March 7, 2011 at 1:30pm
which means you evaluated the slope as 7. So where else is it seven?

f'=6x-2=7

x=1.5

y=3(9/6)^2-2(9/6)+1 figure that out.

Now , you know x,y and the slope, so figure the intercept b.

y=mx+b

- College Calculus -
**NY-Calc**, Monday, March 7, 2011 at 2:01pm
Thank you!

## Answer this Question

## Related Questions

- math - i have more than one question so if u no any of the answers please tell ...
- Math--Calculus - Let y = f(x) be the continuous function that satisfies the ...
- Algebra - graph the equation x-3=y (where do I plot the points?) find the ...
- Math- calculus - Given f(x) = x ^ 3 - x ^ 2 -4x +4 Find the zeros of f. Write an...
- Calculus - 1. Given the function f defined by f(x) = x^3-x^2-4X+4 a. Find the ...
- Pre- Algebra - Given an equation of a line, how do I find equations for lines ...
- More math linear equation help? - I'm looking at this graph where I see a line ...
- Calculus - find an equation of the tangent line to the graph of the function f ...
- Calculus - Graph the function f(x)=x+4/x Graph the secant line that passes ...
- Algebra... - Write the equation of a vertical line passing through the point (8...

More Related Questions