Answer:
a) 
b) 
c) 
Step-by-step explanation:
Given the curve

a) If the x-coordinate of P is
, then the y-coordinate is
so point P has coordinates 
If the x-coordinate of Q is
, then the y-coordinate is
so point Q has coordinates 
b) The gradient of the secant RQ is

c) If
then the gradient 
Sample Answer: Write the equation using slope and y-intercept in slope-intercept form, y = –275x + 3500. Then, substitute the x and y values of the point into the equation, 1850 = –275(6) + 3500. Simplify to see if both sides are equivalent. Yes, the instructor is correct because both sides are equivalent.