Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

For the function 
f(x)=-x^(2)+4x-8, find the slope of the secant line between 
x=2 and 
x=5.
Answer:

For the function f(x)=x2+4x8 f(x)=-x^{2}+4 x-8 , find the slope of the secant line between x=2 x=2 and x=5 x=5 .\newlineAnswer:

Full solution

Q. For the function f(x)=x2+4x8 f(x)=-x^{2}+4 x-8 , find the slope of the secant line between x=2 x=2 and x=5 x=5 .\newlineAnswer:
  1. Define Slope Formula: To find the slope of the secant line between two points on a function, we use the formula for slope, which is the change in yy divided by the change in xx, or f(x2)f(x1)x2x1\frac{f(x_2) - f(x_1)}{x_2 - x_1}. Here, x1=2x_1 = 2 and x2=5x_2 = 5.
  2. Find f(2)f(2): First, we need to find the value of the function at x=2x = 2. We substitute x=2x = 2 into the function f(x)=x2+4x8f(x) = -x^2 + 4x - 8 to get f(2)=(2)2+4(2)8f(2) = -(2)^2 + 4(2) - 8.
  3. Calculate f(2)f(2): Calculating f(2)f(2) gives us f(2)=4+88=4f(2) = -4 + 8 - 8 = -4.
  4. Find f(5)f(5): Next, we need to find the value of the function at x=5x = 5. We substitute x=5x = 5 into the function f(x)=x2+4x8f(x) = -x^2 + 4x - 8 to get f(5)=(5)2+4(5)8f(5) = -(5)^2 + 4(5) - 8.
  5. Calculate f(5)f(5): Calculating f(5)f(5) gives us f(5)=25+208=13f(5) = -25 + 20 - 8 = -13.
  6. Calculate Slope: Now we have the function values at both points: f(2)=4f(2) = -4 and f(5)=13f(5) = -13. We can use these to find the slope of the secant line: slope=f(5)f(2)52\text{slope} = \frac{f(5) - f(2)}{5 - 2}.
  7. Substitute Values: Substituting the values we found, the slope is (13(4))/(52)=(13+4)/3=9/3(-13 - (-4)) / (5 - 2) = (-13 + 4) / 3 = -9 / 3.
  8. Final Slope Calculation: Calculating the slope gives us 9/3=3-9 / 3 = -3.

More problems from Find the roots of factored polynomials