1. **Stating the problem:** We are given two relations:
- $y = 30 - 2x$
- $y = 2(x^2 + 2)$
We need to:
(a) Draw the graphs of these two functions.
(b) Find the values of $y$ for given $x$ values in the second relation.
2. **Understanding the functions:**
- The first function is linear: $y = 30 - 2x$.
- The second function is quadratic: $y = 2(x^2 + 2) = 2x^2 + 4$.
3. **Finding $y$ for given $x$ values in the quadratic function:**
(a) When $x = 5$:
$$y = 2(5^2 + 2) = 2(25 + 2) = 2 \times 27 = 54$$
(b) When $x = 8$:
$$y = 2(8^2 + 2) = 2(64 + 2) = 2 \times 66 = 132$$
4. **Summary:**
- For $x=5$, $y=54$.
- For $x=8$, $y=132$.
These values can be plotted on the graph of $y = 2(x^2 + 2)$.
Graph Values
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.