A. y=1/2x+3 and y=1/4x+5 b. y=3x+1/2 and y=5x+1/4 c. y=2x+3 and y=4x+5 d. y=3x+2 and y=5x+4

Try expressing the problem in the form of two equations. y, or the first number, is equal to half of (1/2) a second number (x) plus 3:

y = 1/2x + 3

y is also equal to 1/4 of the second number (x) plus 5:

y = 1/4x + 5

An easy way to check using the graph is to compare the y-intercepts. The first equation we came up with has a y-intercept of 3, and the second one has a y-intercept of 5. If you look at the graph, the equations intersect the y-axis at (0, 3) and (0, 5). Check ✓

i am sure it will be 90 degrees.

step-by-step explanation: