Question

Match the correct equation with the graph. y = -3x + 4
y = 5/2x + 5
y = -2/5x + 2
y = -3/2x + 2
x = 4

Answer 1

Do you know of the y-intercept concept?

Answer 2

no i do not.........

Answer 3

It means whenever the graph touches the y-axis. Look at the graph you have provided and tell me where does your graph touch (intercept) the y-axis.

Answer 4

it touches at 5

Answer 5

Good. So which of the options in the question say that the equation touches at 5?

Answer 6

id say this one right?y = -2/5x + 2

Answer 7

Ok, you're close but listen. Whenever you see an equation of this form.

y = mx + b

Where m=(-2/5) and b = 2. You know that b is always the y-intercept. Now check them again and tell me. What do you think?

Since b=2 here, it means that the graph touches at 2.

Answer 8

so it would be this right? y = 5/2x + 5

Answer 9

Yes it would. Good job!

Answer 10

thanks ;D