Let's go through each question in the images:

Question 1 (Image 1: Function Equation for the Graph)

The blue line on the graph passes through the point $(0, 2)$, meaning the y-intercept is 2. The slope can be determined by picking two points along the line. From the graph, the line seems to go through $(0, 2)$ and $(2, 4)$, which gives a slope (rise over run) of: $\text{slope} = \frac{4 - 2}{2 - 0} = \frac{2}{2} = 1$ Thus, the equation of the line is: $y = 1x + 2 \quad \text{or simply} \quad y = x + 2$ So, the correct choice is: f(x) = x + 2 or y = x + 2.

Question 2 (Image 2: Scale of the y-axis)

The graph provided in this image shows that at $x = 2$, the corresponding $y$-value is approximately 15. The y-axis seems to be scaled so that each grid line counts by 1.5 units (since from 0 to 15, there are 10 grid lines, each counting 1.5).

Thus, the correct answer is: 1.5.

Let me know if you'd like further details or clarifications on these problems!

Here are five related questions for practice:

1. What is the slope of a line passing through points $(1, 3)$ and $(4, 7)$?
2. How do you determine the slope of a line given its equation in standard form?
3. If a line has a slope of $-2$ and a y-intercept of $3$, what is the equation of the line?
4. What does the slope of a line tell you about the direction of the line on a graph?
5. How can you find the equation of a line given a point on the line and its slope?

Tip: To find the slope of a line on a graph, pick two points on the line and apply the formula $\text{slope} = \frac{\text{change in y}}{\text{change in x}}$.