Maths Question

Question

Which equations have a positive y- intercept and a negative slope? choose yes or No for each

 

A.  y = 3x + 2   Yes or No

 

B   2y = -2x - 3   Yes or No

 

C   2x + 3y =1     Yes or No

 

D   -2 (-y -x) =2    Yes or No

Answer 1

As it happens, the first 'formula' (for y) is already in slope-intercept form, slope being the coefficient of y, b being the y-intercept, in this form y = mx+ b. Since m = 3 (positive slope) and b = 2 (y-intercept), the answer is YES.

 

For the others, SOLVE FOR Y, using algebra skills, e.g. in B divide each term by 2, thus solving for y.  In C, you can first subtract 2x from each side, then divide all terms by 3 to produce y = mx + B.

 

I'll leave you to complete this work.