Question: Write the English sentence as an equation in two variables. Then graph the equation.
The y-value is two more than three times the x-value.
Part 1 of 2
Choose the equation that corresponds to the sentence above.
A.
y equals negative 3 x minus 2
B.
y equals negative 3 x plus 2
C.
y equals 3 x minus 2
D.
y equals 3 x plus 2
Part 2 of 2
Choose the graph of the equation above.
A.
A coordinate system has a horizontal x-axis labeled from negative 8 to 8 in increments of 1 and a vertical y-axis labeled from negative 8 to 8 in increments of 1. A line rises from left to right and passes through the points (0, negative 2) and (1, 1).
-8
-4
4
8
-8
-4
4
8
x
y
A coordinate system has a horizontal x-axis labeled from negative 8 to 8 in increments of 1 and a vertical y-axis labeled from negative 8 to 8 in increments of 1. A line rises from left to right and passes through the points (0, negative 2) and (1, 1).
B.
A coordinate system has a horizontal x-axis labeled from negative 8 to 8 in increments of 1 and a vertical y-axis labeled from negative 8 to 8 in increments of 1. A line rises from left to right and passes through the points (0, 2) and (1, 5).
-8
-4
4
8
-8
-4
4
8
x
y
A coordinate system has a horizontal x-axis labeled from negative 8 to 8 in increments of 1 and a vertical y-axis labeled from negative 8 to 8 in increments of 1. A line rises from left to right and passes through the points (0, 2) and (1, 5).
C.
A coordinate system has a horizontal x-axis labeled from negative 8 to 8 in increments of 1 and a vertical y-axis labeled from negative 8 to 8 in increments of 1. A line falls from left to right and passes through the points (0, 2) and (1, negative 1).
-8
-4
4
8
-8
-4
4
8
x
y
A coordinate system has a horizontal x-axis labeled from negative 8 to 8 in increments of 1 and a vertical y-axis labeled from negative 8 to 8 in increments of 1. A line falls from left to right and passes through the points (0, 2) and (1, negative 1).
D.
A coordinate system has a horizontal x-axis labeled from negative 8 to 8 in increments of 1 and a vertical y-axis labeled from negative 8 to 8 in increments of 1. A line falls from left to right and passes through the points (0, negative 2) and (1, negative 5).
-8
-4
4
8
-8
-4
4
8
x
y
A coordinate system has a horizontal x-axis labeled from negative 8 to 8 in increments of 1 and a vertical y-axis labeled from negative 8 to 8 in increments of 1. A line falls from left to right and passes through the points (0, negative 2) and (1, negative 5).
1. **State the problem:**
We are given the sentence: "The y-value is two more than three times the x-value." We need to write this as an equation in two variables $x$ and $y$, then identify the correct graph.
2. **Translate the sentence into an equation:**
"Two more than three times the x-value" means:
$$y = 3x + 2$$
This is because "three times the x-value" is $3x$, and "two more than" means add $2$.
3. **Check the options for the equation:**
- Option A: $y = -3x - 2$ (incorrect sign for slope and intercept)
- Option B: $y = -3x + 2$ (incorrect slope sign)
- Option C: $y = 3x - 2$ (incorrect intercept)
- Option D: $y = 3x + 2$ (correct)
So, the correct equation is **D**.
4. **Analyze the graph options:**
The equation $y = 3x + 2$ has:
- y-intercept at $(0, 2)$
- slope $3$, meaning for each increase of $1$ in $x$, $y$ increases by $3$.
Check the points given in the graphs:
- Graph A: passes through $(0, -2)$ and $(1, 1)$ (incorrect intercept)
- Graph B: passes through $(0, 2)$ and $(1, 5)$ (correct: $5 = 3(1) + 2$)
- Graph C: passes through $(0, 2)$ and $(1, -1)$ (incorrect slope)
- Graph D: passes through $(0, -2)$ and $(1, -5)$ (incorrect intercept and slope)
Therefore, the correct graph is **B**.
**Final answers:**
- Equation: $$y = 3x + 2$$ (Option D)
- Graph: Option B