chardajiac
contestada

A line passes through the point (-2, 7) and has a slope of -5.

What is the value of a if the point (a, 2) is also on the line?

A. 7
B. -1
C. 1
D. 7​

Respuesta :

giangthaochung178

Answer:

a= -1

B

Step-by-step explanation:

My opinion:

the slope m = (y2 - y1) / (x2 - x1)

slope m is -5

y2 is 7

y1 is 2

x2 is -2

x1 is a

so the equation will be

-5 = (7 - 2) / (-2 -a )

10 + 5a = 5

5a = -5

a = -1

Then you can plug the value a = -1 into the equation of the slope m to double check it.

Otras preguntas