Q. For the function f(x)=x2−2, find the slope of the secant line between x=1 and x=4.Answer:
Slope Formula: To find the slope of the secant line between two points on a function, we use the slope formula: slope=x2−x1f(x2)−f(x1), where x1 and x2 are the x-coordinates of the two points.
Find y-coordinate at x=1: First, we need to find the y-coordinate for the point where x=1 by plugging it into the function f(x)=x2−2.f(1)=(1)2−2=1−2=−1.
Find y-coordinate at x=4: Next, we need to find the y-coordinate for the point where x=4 by plugging it into the function f(x)=x2−2.f(4)=(4)2−2=16−2=14.
Calculate Slope: Now we have two points: (1,f(1))=(1,−1) and (4,f(4))=(4,14). We can use these points to find the slope of the secant line.slope=4−1f(4)−f(1)=4−114−(−1)=314+1=315.
Final Result: Calculating the slope gives us 315=5. So, the slope of the secant line between x=1 and x=4 for the function f(x)=x2−2 is 5.