User interface language: English | Español

Date May 2018 Marks available 4 Reference code 18M.2.SL.TZ1.T_4
Level Standard Level Paper Paper 2 Time zone Time zone 1
Command term Sketch Question number T_4 Adapted from N/A

Question

Consider the function  f ( x ) = 48 x + k x 2 58 , where x > 0 and k is a constant.

The graph of the function passes through the point with coordinates (4 , 2).

P is the minimum point of the graph of f (x).

Sketch the graph of y = f (x) for 0 < x ≤ 6 and −30 ≤ y ≤ 60.
Clearly indicate the minimum point P and the x-intercepts on your graph.

Markscheme

(A1)(A1)(ft)(A1)(ft)(A1)(ft)

Note: Award (A1) for correct window. Axes must be labelled.
(A1)(ft) for a smooth curve with correct shape and zeros in approximately correct positions relative to each other.
(A1)(ft) for point P indicated in approximately the correct position. Follow through from their x-coordinate in part (c). (A1)(ft) for two x-intercepts identified on the graph and curve reflecting asymptotic properties.

[4 marks]

Examiners report

[N/A]

Syllabus sections

Topic 2—Functions » SL 2.3—Graphing
Show 53 related questions
Topic 5 —Calculus » SL 5.4—Tangents and normal
Topic 5 —Calculus » SL 5.8—Testing for max and min, optimisation. Points of inflexion
Topic 2—Functions
Topic 5 —Calculus

View options