Question

Which equation describes the linear relationship shown in the graph?

A coordinate plan that shows the following points plotted which connect to form a straight line: negative four comma negative two, negative two comma zero, zero comma two, two comma four, four comma six

y equals x plus two

y equals x minus two

y equals two x

y equals one-half x

Answer 1

Find the equation of the graph using the point-slope form,
y = y1 + m(x - x1) where (x1 , y1) is any point on the line and m is the gradient of the line with formula (y2 - y1) / (x2 - x1) where (x1 , y1) and (x2 , y2) are any 2 points except the same point on the line