Hi!! please need help putting formula's on graphs..

Hi there!!!(Hi)

I am in need of some urgent help... if anyone would be so kind as to help me i would soooo appreciate it!! (Bow)

I'm a homeschooled missionary in Mozambique, and have exams coming up next week, and i need to understand this one problem, but i can't!! Here it is:

How do i put the formulae P=50 + 2T and P=20 + 3T on a axis graph? i have axis Y and axis X.

If i must explain any further, i so would appreciate any help!!

THANK YOU!!

Westraad

Re: Hi!! please need help putting formula's on graphs..

Quote:

Originally Posted by

**westraad** How do i put the formulae P=50 + 2T and P=20 + 3T on a axis graph? i have axis Y and axis X.

You should either have Y = 50 + 2X with axes Y and X or P = 50 + 2T with axes P and T. Assuming the latter, choose some values of the independent variable, i.e., T, and compute the corresponding values of the dependent variable, i.e., P. E.g., for T = 1 you get P = 50 + 2 * 1 = 50 + 2 = 52. Then plot the resulting pairs (T, P) on the graph and connect them. As it turns out, the graph of P = 50 + 2T is a straight line, so it is sufficient to find two points. Choose any T1, T2, compute P1 = 50 + 2 * T1, P2 = 50 + 2 * T2, plot (P1, T1) and (P2, T2) and connect them.

Re: Hi!! please need help putting formula's on graphs..

Quote:

Originally Posted by

**westraad** Hi there!!!(Hi)

I am in need of some urgent help... if anyone would be so kind as to help me i would soooo appreciate it!! (Bow)

I'm a homeschooled missionary in Mozambique, and have exams coming up next week, and i need to understand this one problem, but i can't!! Here it is:

How do i put the formulae P=50 + 2T and P=20 + 3T on a axis graph? i have axis Y and axis X.

If i must explain any further, i so would appreciate any help!!

THANK YOU!!

Westraad

Use P as your dependent variable (Y) and T as your independent variable (X). Then your first equation has a P (Y) intercept of 50 and gradient 2, and the second equation has P (Y) intercept of 20 and gradient of 3.

Does that help?

Re: Hi!! please need help putting formula's on graphs..

THANK YOU SO MUCH!!!!!! (Rofl)(Rofl)(Rofl)(Rofl)(Rofl)

I figured it out! i sooo appreciate your all's help here!! (Evilgrin)

Re: Hi!! please need help putting formula's on graphs..

Note that those are **linear** equations and lines are determined by two points. Find two (x, y) pairs satisfying each equation, plot those points, and draw a line through those points. For example if x= 0 and y= 50+ 2x, then y= 50+ 2(0)= 50 so one point is (0, 50). y= 0, the 0= 50+ 2x, 2x= -50, and x= -25. Another point is (-25, 0). Mark those points on the axes and draw the line through them.