FINDING THE Y INTERCEPT OF THE LINE FROM EQUATION

Write down where each of these lines cross the y – axis [y –intercept]

Problem 1 :

y = 2x + 3

Solution :

To find y – intercept :

When x = 0

y = 2(0) + 3

Then y = 3

So, y – intercept is (0, 3).

Problem 2 :

y = 7x + 1

Solution :

To find y – intercept :

When x = 0

y = 7(0) + 1

Then y = 1

So, y – intercept is (0, 1).

Problem 3 :

y = 3x - 2

Solution :

To find y – intercept :

When x = 0

y = 3(0) - 2

Then y = -2

So, y – intercept is (0, -2).

Problem 4 :

y = x - 5

Solution :

To find y – intercept :

When x = 0

y = 0 - 5

Then y = -5

So, y – intercept is (0, -5).

Problem 5 :

y = 2x

Solution :

To find y – intercept :

When x = 0

y = 2(0)

Then y = 0

So, y – intercept is (0, 0).

Problem 6 :

y = -4x + 6

Solution :

To find y – intercept :

When x = 0

y = -4(0) + 6

Then y = 6

So, y – intercept is (0, 6).

Problem 7 :

y = -5x - 3

Solution :

To find y – intercept :

When x = 0

y = -5(0) - 3

Then y = -3

So, y – intercept is (0, -3).

Problem 8 :

y = -3x

Solution :

To find y – intercept :

When x = 0

y = -3(0)

Then y = 0

So, y – intercept is (0, 0).

Problem 9 :

y = (4/3)x + 2/5

Solution :

To find y – intercept :

When x = 0

y =  (4/3)0 + 2/5

Then y = 2/5

So, y – intercept is (0, 2/5).

Problem 10 :

y = (-2/3)x – 1/2

Solution :

To find y – intercept :

When x = 0

y = (-2/3)(0) – 1/2

Then y = -1/2

So, y – intercept is (0, -1/2)