Math Problem Statement

Vilken eller vilka av punkterna ligger på grafen till y = -3x + 2?

Solution

The question is asking which points from the given options lie on the graph of the equation y=3x+2y = -3x + 2. We will substitute the xx-coordinates of each point into the equation and check if the corresponding yy-coordinates match.

Equation: y=3x+2y = -3x + 2

a) (1,5)(-1, 5)

Substitute x=1x = -1 into the equation: y=3(1)+2=3+2=5y = -3(-1) + 2 = 3 + 2 = 5 This matches the given yy-coordinate. So, point (1,5)(-1, 5) lies on the graph.

b) (0,2)(0, 2)

Substitute x=0x = 0 into the equation: y=3(0)+2=0+2=2y = -3(0) + 2 = 0 + 2 = 2 This matches the given yy-coordinate. So, point (0,2)(0, 2) lies on the graph.

c) (2,5)(2, -5)

Substitute x=2x = 2 into the equation: y=3(2)+2=6+2=4y = -3(2) + 2 = -6 + 2 = -4 This does not match the given yy-coordinate (which is 5-5). Therefore, point (2,5)(2, -5) does not lie on the graph.

Conclusion:

Points (1,5)(-1, 5) and (0,2)(0, 2) lie on the graph of y=3x+2y = -3x + 2.

Do you want more details or have any questions?

Here are 5 related questions you can consider:

  1. What is the slope of the line y=3x+2y = -3x + 2?
  2. How do you find the y-intercept from a linear equation?
  3. Can two points determine a unique line? Why or why not?
  4. What would the equation of a line be if it was parallel to y=3x+2y = -3x + 2?
  5. How can you graph y=3x+2y = -3x + 2 using its slope and intercept?

Tip: To check if a point lies on a graph, always substitute the coordinates into the equation and verify the results.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Graphing

Formulas

y = mx + b

Theorems

Point-Slope Formula

Suitable Grade Level

Grades 7-9