Write an equation for the line with a slope of 2 snd the points (5,10) and (1,2)

y = 2x

work:

let's use the equation y = mx + b, m stands for slope and b stands for the y intercept.

we know the value for the slope, so let's plug it into the equation.

y = 2x + b

okay, so to find the missing value, b, plug in the y and x values.

10 = 2(5) + b

now, solve.

10 = 10 + b

0 = b

so, now we now b has a value of 0.

so, the slope is 2, so our equation is y = 2x. hope this helps!

answer is c

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18