Class 9 · FBISE Math · Linear Graphs

Seedhi Line Lab

Equation likho, line khud ban jayegi. Sliders hilao aur dekho ke m (slope) aur c (y-intercept) line ko kaise badalte hain.

1. Graph Lab

y = 2x + 1

Misaal: y = -x + 4, 2x + y = 6, y = 0.5x, x = 3

m (slope / dhalaan) 2

c (y-intercept) 1

Slope triangle Intercepts Table points

Graph dekho aur sahi equation chuno. Pehle dekho line upar ja rahi hai ya neeche (slope ka sign), phir y-axis kahan kaat rahi hai (c).

Sahi: 0Ghalat: 0Sawal: 1

Har sawal ko qadam ba qadam hal karo. Pehle khud socho, phir "Agla qadam" dabao.

y = mx + c

m = slope (line kitni tez charhti hai), c = jahan line y-axis ko kaatti hai.

m = (y₂ − y₁) / (x₂ − x₁)

Do points se slope: "rise ÷ run", yani upar kitna gaye ÷ aage kitna gaye.

m > 0 · m < 0

Positive slope: line left se right upar jaati hai. Negative: neeche aati hai.

y = k · x = k

y = 4 horizontal line (slope 0). x = 3 vertical line (slope undefined).

x-intercept: y = 0

x-axis wala point nikalne ke liye equation mein y = 0 rakho.

y-intercept: x = 0

y-axis wala point nikalne ke liye x = 0 rakho. Jawab hamesha (0, c).