What is the answer for question 4. b) ?http://postimg.org/image/xusvq33e3/

1 Answer

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crmhaske | College Teacher | (Level 3) Associate Educator

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A secant is a straight line connecting two points on a curve; therefore, the first thing we need to do is solve for the y values at the two given values of x:

-2log(1)+3 = 3

-2log(1.5)+3 = 2.65

Therefore, the two points are (1,3) and (1.5,2.65).

Slope = rise/run:


Therefore, the slope of the secant line through the points on the curve at x=1 and x=2 is -0.7.