Question

Can you explain how to do this problem?

http://prntscr.com/3ks62l

Answer 1

Write the formula in terms of y = mx + b.

m would be the slope, and b would be the y intercept.

Note that y shouldn't have any coefficients.

Answer 2

2 would be the M, correct? if so, would B be the 5?

Answer 3

2x - 5y = 20

-5y = 20 - 2x
y = -(20-2x)/5
y = (-20+2x)/5

y = -4 + (2/5)x

In this case, m would be 2/5 and b would be -4.

Answer 4

So now, you know the answer has to be either C or D.

Answer 5

Because the slope is positive, the graph should be pointing upwards. This means that the answer should be C.

Answer 6

Hope this guides you through future problems.

Answer 7

It will once I fully understand it, but will you explain how the 5 turned negative when it switched places with the 20?

Answer 8

I divided by -5 on both sides. Remember, we need y to be by itself.

After dividing it by a negative number I took the negative sign to the numerators.

Answer 9

-5/2 = 5/-2

Answer 10

geez, math can be really confusing, but thanks, i think understand it now.

Answer 11

My pleasure. All the best mate.