# Struggling with linear graphs

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I have a question

"On the grid, draw the graph of y = 4x − 1 from x = −2 to x = 4"

I am unsure how to get the y and x value out of these equations, could anyone explain or recommend a video/website to help me?

"On the grid, draw the graph of y = 4x − 1 from x = −2 to x = 4"

I am unsure how to get the y and x value out of these equations, could anyone explain or recommend a video/website to help me?

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#2

From this equation, and the given x values (x = -2 and x = 4), you will get two coordinates (two y values for each of those x values).

To find the y value for the first x value (x = -2), you need to put the number -2 into the equation where x is. So it becomes:

y = 4(-2) - 1, when you multiply 4 by -2, you get: y = - 8 - 1, which then gives you y = -9. That means the first coordinate is (-2,-9)

To find the y value for the second x value (x = 4), you will need to put the number 4 into the equation where x is. So it becomes:

y = 4(4) - 1, when you multiply 4 by 4, you get: y = 16 - 1, which then gives you y = 15. That means the second cordinate is (4,15)

You then use the two coordinates and plot them on a graph, which will give you two points. Connect the two points with a straight line, and you have your linear graph

To find the y value for the first x value (x = -2), you need to put the number -2 into the equation where x is. So it becomes:

y = 4(-2) - 1, when you multiply 4 by -2, you get: y = - 8 - 1, which then gives you y = -9. That means the first coordinate is (-2,-9)

To find the y value for the second x value (x = 4), you will need to put the number 4 into the equation where x is. So it becomes:

y = 4(4) - 1, when you multiply 4 by 4, you get: y = 16 - 1, which then gives you y = 15. That means the second cordinate is (4,15)

You then use the two coordinates and plot them on a graph, which will give you two points. Connect the two points with a straight line, and you have your linear graph

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(Original post by

From this equation, and the given x values (x = -2 and x = 4), you will get two coordinates (two y values for each of those x values).

To find the y value for the first x value (x = -2), you need to put the number -2 into the equation where x is. So it becomes:

y = 4(-2) - 1, when you multiply 4 by -2, you get: y = - 8 - 1, which then gives you y = -9. That means the first coordinate is (-2,-9)

To find the y value for the second x value (x = 4), you will need to put the number 4 into the equation where x is. So it becomes:

y = 4(4) - 1, when you multiply 4 by 4, you get: y = 16 - 1, which then gives you y = 15. That means the second cordinate is (4,15)

You then use the two coordinates and plot them on a graph, which will give you two points. Connect the two points with a straight line, and you have your linear graph

**Vauntedmango**)From this equation, and the given x values (x = -2 and x = 4), you will get two coordinates (two y values for each of those x values).

To find the y value for the first x value (x = -2), you need to put the number -2 into the equation where x is. So it becomes:

y = 4(-2) - 1, when you multiply 4 by -2, you get: y = - 8 - 1, which then gives you y = -9. That means the first coordinate is (-2,-9)

To find the y value for the second x value (x = 4), you will need to put the number 4 into the equation where x is. So it becomes:

y = 4(4) - 1, when you multiply 4 by 4, you get: y = 16 - 1, which then gives you y = 15. That means the second cordinate is (4,15)

You then use the two coordinates and plot them on a graph, which will give you two points. Connect the two points with a straight line, and you have your linear graph

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#4

(Original post by

Thankyou!! I have one more question if you could answer it please- y=6x + 1 How do I work this out?

**noodlestopshop**)Thankyou!! I have one more question if you could answer it please- y=6x + 1 How do I work this out?

Same method. For the first x value (x = -2), the y value can be found by putting -2 where x is:

y = 6(-2) + 1. Multiplying 6 by -2 gives: y = -12 + 1, which gives y = -11. So the first coordinate is (-2, -11)

For the second x value (x = 4), the y value can be found by putting 4 where x is:

y = 6(4) + 1. Multiplying 6 by 4 gives: y= 24 +1, which gives y = 25. So the second coordinate is (4, 25)

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#5

**Vauntedmango**)

From this equation, and the given x values (x = -2 and x = 4), you will get two coordinates (two y values for each of those x values).

To find the y value for the first x value (x = -2), you need to put the number -2 into the equation where x is. So it becomes:

y = 4(-2) - 1, when you multiply 4 by -2, you get: y = - 8 - 1, which then gives you y = -9. That means the first coordinate is (-2,-9)

To find the y value for the second x value (x = 4), you will need to put the number 4 into the equation where x is. So it becomes:

y = 4(4) - 1, when you multiply 4 by 4, you get: y = 16 - 1, which then gives you y = 15. That means the second cordinate is (4,15)

You then use the two coordinates and plot them on a graph, which will give you two points. Connect the two points with a straight line, and you have your linear graph

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