Question

can someone help me find a (y=mx b) equation

Answer 1

Welcome to QuestionCove! Our mathematics helpers is @Vocaloid or @Dude . They should be able to help you!

Answer 2

thank you

Answer 3

well if you already have two points on the graph ((7,-15) and (2,-5)) for example you just need to write an equation for these two points

slope formula = (y2-y1)/(x2-x1) gives you m and then you can find b by substituting x,y, and m into the equation

Answer 4

check your calculations for m again

Answer 5

((7,-15) and (2,-5))

gives us

(-5-(-15))/ ( 2-7) = ?

Answer 6

good

now just pick a point (2,-5) and let this be your x, y value

then find b

Answer 7

(2,-5) means x = 2 and y = -5

so y = mx + b becomes
-5 = -2(2) + b

solve for b

Answer 8

good, so your equation is y = -2x - 1

Answer 9

there are no restrictions on x, so the domain for x is (-infinity, + infinity)

for the range, think about the fact that -x^2 has a maximum of 0, and since the function is

-2(x-4)^2 + 3

the y value has a maximum of 3

Answer 10

so express "all y values less than 3" in interval notation