A thermal sensor in a precision cooling chamber monitors the temperature deviation, TTT (in degrees Celsius), relative to a set point. For a specific cycle, the deviation is modeled by the function:
T(h)=4−∣2h+3∣ T(h) = 4 - |2h + 3| T(h)=4−∣2h+3∣where hhh is the time in hours.
Identify the correct graphical representation of T(h)T(h)T(h) from the descriptions provided below.
Option A: An inverted V-shaped graph with a vertex at (−1.5,4)(-1.5, 4)(−1.5,4) and a TTT-intercept at (0,1)(0, 1)(0,1).
Option B: A V-shaped graph with a vertex at (1.5,4)(1.5, 4)(1.5,4) and a TTT-intercept at (0,7)(0, 7)(0,7).
Option C: An inverted V-shaped graph with a vertex at (1.5,−4)(1.5, -4)(1.5,−4) and a TTT-intercept at (0,−7)(0, -7)(0,−7).
Option D: A V-shaped graph with a vertex at (−1.5,−4)(-1.5, -4)(−1.5,−4) and a TTT-intercept at (0,−1)(0, -1)(0,−1).
532 exam-style questions on AQA A Level Maths 1.5 B: Algebra and functions, covering 1.5.1 Laws of indices, 1.5.2 Surds, 1.5.3 Quadratic functions, 1.5.4 Simultaneous equations, 1.5.5 Linear and quadratic inequalities, 1.5.6 Polynomials and rational expressions, 1.5.7 Graphs of functions and proportion, 1.5.8 Composite and inverse functions (A-level only), 1.5.9 Transformations of graphs, 1.5.10 Partial fractions (A-level only), and 1.5.11 Functions in modelling (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.