whadduptori 3 years ago Please help? Write an equation of the line, in point-slope form, that passes through the two given points. points: (–2, 15), (9, –18)

1. dpaInc

can you calculate the slope of the line passing through those two points? use: $$\Large slope=m=\frac{y_2-y_1}{x_2-x_1}$$

2. dpaInc

do you know how to use the slope formula?

would the answer be y-15=-3(x+2)

4. dpaInc

yep...:)

5. dpaInc

of course, the answer is not unique... you could've also used the other (9, -18).... :)

6. dpaInc

*other point (9, -18)

thank you so much! do you mind helping?

i have one more

9. dpaInc

go ahead and post up a new question.... i don't think open study will run out of hard drive space anytime soon.

What is the equation of the given line in standard form? Use integer coefficients. y = –1.7x + 8.5

11. dpaInc

this is standard form: Ax + By = C, where A, B, C are integer coefficients... so in your slope-intercept form, we need to clear the decimals by multiplying by the whole equation by 10... $$\Large y = –1.7x + 8.5$$ $$\Large \color {red}{10}[y = –1.7x + 8.5]$$ can you tell me what youd get here?