Let’s break down each part of the question regarding the equation \( y = 11 + 1.25x \):
A. What is the y-intercept?
The y-intercept is the value of \( y \) when \( x = 0 \). From the equation: \[ y = 11 + 1.25(0) \] So, the y-intercept is \( 11 \).
B. What does the y-intercept mean in context?
The y-intercept, \( 11 \), represents the cost of a meal with one meat and no side dishes (i.e., when \( x = 0 \)). In context, this means that the base cost of the meal is $11.
C. What is the slope?
The slope of the equation \( y = 11 + 1.25x \) is the coefficient of \( x \), which is \( 1.25 \).
D. What does the slope mean in context?
The slope, \( 1.25 \), indicates the additional cost for each side dish added to the meal. In context, it means that for every side dish Jodi adds, the total cost of her meal increases by $1.25.
E. If Jodi paid $18.50 for her meal, how many side dishes did she get?
To find the number of side dishes Jodi got, we can set \( y = 18.50 \) and solve for \( x \): \[ 18.50 = 11 + 1.25x \] Subtract \( 11 \) from both sides: \[ 18.50 - 11 = 1.25x \] \[ 7.50 = 1.25x \] Now, divide both sides by \( 1.25 \): \[ x = \frac{7.50}{1.25} = 6 \] So, Jodi had 6 side dishes.
Summary of Answers
- A: \( 11 \)
- B: The cost of a meal with 0 sides.
- C: \( 1.25 \)
- D: The amount per side dish.
- E: \( 6 \).