Math Problem Statement

ANSWER??

If you were to graph a line with a slope of 3/2 that intercepts the y-axis at -2 on the coordinate plane, one point on that line would have a y-coordinate of 4 with an x-coordinate of what number?

Solution

Let's break down and solve the problem:

We are given the following information:

  • The slope of the line m=32m = \frac{3}{2}
  • The y-intercept (where the line crosses the y-axis) is at y=2y = -2, meaning the equation of the line is in the slope-intercept form y=mx+by = mx + b, which gives us the equation: y=32x2y = \frac{3}{2}x - 2
  • We need to find the xx-coordinate when the yy-coordinate is 44.

Step 1: Plug y=4y = 4 into the equation of the line

We substitute y=4y = 4 into the equation: 4=32x24 = \frac{3}{2}x - 2

Step 2: Solve for xx

First, add 2 to both sides to get rid of the constant: 4+2=32x4 + 2 = \frac{3}{2}x 6=32x6 = \frac{3}{2}x

Next, multiply both sides by 23\frac{2}{3} to solve for xx: x=6×23x = 6 \times \frac{2}{3} x=4x = 4

Final Answer:

The xx-coordinate is 44.

Would you like more details or have any questions?

Related Questions:

  1. How do you derive the equation of a line from two points?
  2. What does the slope represent in the context of a real-world problem?
  3. How do you calculate the slope if you are given two points?
  4. How can you find the x-intercept of a line using its equation?
  5. What is the relationship between parallel lines and their slopes?

Tip:

Always remember that the slope represents the rate of change, and for every increase of 2 units in xx, yy increases by 3 units in this particular equation.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

y = mx + b

Theorems

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Suitable Grade Level

Grades 8-10